Or maybe we tackle this from 180 degrees.

As opposed to what is happening, or how likely, we may find common ground on what it is we should actually be doing.

I've already made the suggestion of electric vehicles and fission, fusion or renewables in place of coal as the road away from emissions. Specifically improving li-ion batteries as Tesla is doing is a major step. Researching sodium-oxygen batteries would be even better as they can hold 4-5 times the power and have cheaper materials and recent results have us close to making them viable, so I'd like to see gov money directed there.

For power solar and wind are currently only cost-competitive because the scale is small enough that we get away with treating coal plants like giant batteries covering our baseline. They simply aren't cost effective to scale up for base load yet, and not likely to be for another 10-20 years. We can have a lot of nuclear plants built in that time. With electric cars coming into the picture, we're also going to need that extra electric capacity. I again would strongly encourage more gov money going into French style large scale nuclear power deployment. China's already doing it, even they've had enough of their current coal literally blocking the sun in the sky on them and nuclear is part of their clean air push. We should be encouraging that and following suit out this way.

I also wasn't kidding about Lockheed-Martin's fusion research. A lot of new ideas are out there for fusion confinement plans and Lockheed has publicly declared their intentions to have a demonstration reactor in 5 years time. I'm hopeful, and if that pans out, the roll out of truly cheap and clean power will start in the next decade for the sole reason that fusion under cuts coal for price.

Part of me reason for these measures versus more drastic ones is we need to keep our economies growing because regardless of what we do the next 30 years, the oceans will continue rising that entire time and the mitigation measures we're going to gradually be spending more and more on are gonna required us to have the money to do them.

If anybody's got better suggestions I'm all ears.

@newtboy

#1 and #2, fine, if you won't go there to read it's now pasted in full for you:
Arctic tundra soils serve as potentially important but poorly understood sinks of atmospheric methane (CH4), a powerful greenhouse gas1, 2, 3, 4, 5. Numerical simulations project a net increase in methane consumption in soils in high northern latitudes as a consequence of warming in the past few decades3, 6. Advances have been made in quantifying hotspots of methane emissions in Arctic wetlands7, 8, 9, 10, 11, 12, 13, but the drivers, magnitude, timing and location of methane consumption rates in High Arctic ecosystems are unclear. Here, we present measurements of rates of methane consumption in different vegetation types within the Zackenberg Valley in northeast Greenland over a full growing season. Field measurements show methane uptake in all non-water-saturated landforms studied, with seasonal averages of − 8.3 ± 3.7 μmol CH4 m−2 h−1 in dry tundra and − 3.1 ± 1.6 μmol CH4 m−2 h−1 in moist tundra. The fluxes were sensitive to temperature, with methane uptake increasing with increasing temperatures. We extrapolate our measurements and published measurements from wetlands with the help of remote-sensing land-cover classification using nine Landsat scenes. We conclude that the ice-free area of northeast Greenland acts as a net sink of atmospheric methane, and suggest that this sink will probably be enhanced under future warmer climatic conditions.

#3, regardless of if it make's sense to you, and regardless of if it means a 10C warming by 2100, the IPCC scientists collaborative summary says it anyways. If you want to claim otherwise it's you opposing the science to make things seem worse than they are, not me.

#4, To tell them those things would sound like this. The IPCC current best estimates from climate models project 2100 to be 1.5C warmer than 2000. This has already resulted in 2000 being 0.8C warmer than 1900. Summer arctic sea ice extent has retreating significantly is the biggest current impact. By 2100 it is deemed extremely unlikely that the Greenland and Antarctic iccesheets will have meaningfully reduced and there is medium confidence that the warming will actually expand Antarctic ice cover owing to increased precipitation from the region. That's the results and expectations to be passed on from the 5th report from an international collaboration of scientists. Whether that fits your world view or not doesn't matter to the scientific evidence those views are founded on and supported by.

You said the ocean's may be unfishable in 20 years, and the best support you came up with was a news article quote claiming that by 2040 most of the Arctic would be too acidic for Shell forming fish. Cherry picked by the news article that also earlier noted that was dependent on CO2 concentrations exceeding 1000ppm in 2100, and even that some forms of plankton under study actually faired better in higher acidity in some case. In a news article that also noted that the uneven distribution of acidity makes predicting the effects very challenging. If news articles count as evidence I then want to claim we'll have working fusion power to convert to in 5 years time from Lockheed Martin. I'll agree with your news post on one count, the world they talk about, where CO2 emissions continue accelerating year on year, even by 2100, is bad. It's also a bit hard to fathom with electric cars just around the corner, and if not solar and wind, fusion sometime before then too, that we'll still be using anywhere near today's emissions let alone still accelerating our use.

by 2025 it's estimated that 2/3 of people worldwide will live in a water shortage.
And you link to a blog, and a blog that provides exactly zero references to any scientific sources for the claim. Better yet, even the blog does NOT claim that the access to water will be limited because of climate change, the blog even mentions multiple times how other forms of pollution are destroying huge amounts of fresh water(again with zero attributions).

Here's the IPCC best estimates for 2100 impacts regionally:
http://www.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_Chapter14_FINAL.pdf

You'll find it's a largely mixed bag if you can be bothered to read what the actual scientists are predicting. Just bare in mind they regularly note that climate models still have a lot of challenges with accurate regional estimates. I guess your blogger isn't hindered by such problems though. If you don't want to bother I'll summarize for you and note they observe a mixed bag of increased precipitation in some regions, notably monsoons generally increasing, and other areas lowering, but it's all no higher than at medium confidences. But hey, why should uncertainty about 2100 prevent us from panicking today about more than half the world losing their drinking water in 10 years. I'll make you a deal, in ten years we can come back to this thread and see whether or not climate change has cause 2/3 of the world to lose their drinking water already or not. I'm pretty confident on this one.

Northern India/Southern China is nearly 100% dependent on glacial melt water, glaciers that have lost 50% in the last decade
Lost 50% since 2005? That'd be scary, oh wait, you heard that from the same blog you say? I've got a hunch maybe they aren't being straight with you...
Here are a pair of links I found in google scholar to scientific articles on the Himalaya's glaciers:
http://cires1.colorado.edu/~braup/himalaya/Science13Nov2009.pdf
I you can't be bothered to read:
Claims reported in the popular press that Siachin has shrunk as much as 50% are simply wrong, says Riana, whose report notes that the glacier has "not shown any remarkable retreat in the last 50 years" Which looks likely that your blogger found a popular press piece about that single glacier and then went off as though it were fact, and across the entire mountain range .

http://indiaenvironmentportal.org.in/files/glaciers%20and%20climate.pdf
Here's another article noting that since 1962 Himalayan glacier reduction is actually about 21%.

If you go back and read the IPCC links I gave earlier you can also find many of the regional rivers and glaciers in India/East China are very dependent on monsoons and will persist as long as monsoons do. Which the IPCC additionally notes are expected to, on the whole, actually increase through 2100 warming.

I've stated before up thread that things are warming and we are the major contribution, but merely differed from your position be also observing the best evidence science has for predictions isn't catastrophic. That is compounded by high uncertainties, notably that TOA energy levels are still not able to be predicted well. The good news there is the latest IPCC estimated temps exceed the observed trends of both temperature and TOA imbalance, so there's reason for optimism. That's obviously not license for recklessly carrying on our merry way, as I've noted a couple times already about roads away from emissions that we are going to adopt one way or another long before 2100.

0.8 degree increase in 100 years. We've come from the 1915 and WW1 days when cars and planes where futuristic dreams, and not dying from tetanus or basic infections was a major concern. Today 100 years later we are thriving by comparison, in spite of the 0.8 degree increased temperature. IPCC best estimates for 2100 are about 1.5 degree increase, so another hundred years and increase that is about twice as bad. Of course, it's twice as bad as what we saw the last 100 yeas and not only survived, but thrived under. It's a problem to be sure, but it's also no catastrophe either. Switching to electric cars within 20 years will reduce emissions alot and is likely inevitable no matter what. Adopting non-emitting power is possible today if people accept nuclear as France did years ago, and would be a good idea if we could only sell environmentalists on the idea. Barring that we are waiting another 20-40 years for alternatives like solar, wind and hopefully Fusion to undercut the costs of running on coal. That said, without any special moral or government mandate we should be cutting our CO2 emissions radically long before 2100 of our own accord.

Bottom line, don't panic, it's a manageable problem and we got this. In the last 100 years we've come from not having cars or planes or space craft or computers or modern medicine to taking all those things entirely for granted. It's really hard to say that 100 years from now our descendants will be crying for their inability to cope.

The linked article on Fusion cites a Volvo spokesperson.

Apparently, this XC60 didn't have the pedestrian detection system installed in the first place. And even if it did, the accelerator automatically overrides the brake command given by the system. Not the way I would have designed it...

For some reason I imagine you're Goku, forever creating powerful super saiyen children to dominate the universe. Pair them off, have them fuison dance, then have the fused pairs fusion dance, and then finally you fusion dance with the super fused saiyen entity and become -- I don't know. Scanners don't work so well after that.

The sheer numerical value is pointless and really, why? Why do you keep having these saiyen children? Don't you realize they will destroy the universe?!?!?!

Talon fucking fusion reactor deathrays motherfuckas for less. You best not joke around about the systematic enslavery and experimentation of living, thinking, feeling space entities, BITCH. Recognize.

When a lightbulb runs a DoS attack on your smart home, you have entered the realm of 21st century problems:

http://fusion.net/story/55026/this-guys-light-bulb-ddosed-his-entire-smart-house/

I'm guess from you're tone your American, or at least only figure Americans are going to be reading? You note that 'we' can't get to the moon, while Chinese rovers navigate it's surface. You note with alarm what coastal Florida will face from sea level rise, and not an entire nation like Kiribati. When we look at a global problem we can't ignore technology just because it's Chinese, or focus so hard on Florida's coast we ignore an entire nation in peril.

Sea levels aren't going to be fine in 2099 and then rise a foot on the eve of 2100. They will continue to rise about 3mm annually, as they have already for the last 100 years.(on a more granular level slightly less than 3mm nearer 1900 and slightly more nearer 2100 but the point stands). Coastal land owners aren't merely going to see this coming. They've watched it happening for nearly 100 years already and managed to cope thus far. Cope is of course a bad word for building housing near the coast and at less than a foot above sea level. It's like how occupants at the base of active volcanoes 'cope' with the occasional eruption. All that is to say, the problem for homes built in such locations has always been a matter of when not if disaster will strike. The entire island nation of Kiribati is barely above sea level. It is one tsunami away from annihilation. Climate change though is, let me be brutally honest, a small part of the problem. A tsunami in 1914 would've annihilated Kiribati, as a tsunami today in 2014 would, as a tsunami in 2114 would. And we are talking annihilate in a way the 2004 tsunami never touched. I mean an island that's all uninhabited, cleared to the ground and brand new, albeit a bit smaller for the wear. That scenario is going to happen sooner or later, even if the planet were cooling for the next 100 years so let's be cautious about preaching it's salvation through prevention of climate change.

Your points on food production are, sorry, wrong. You are correct enough that local food growth is a big part of the problem. You are dead wrong that most, or even any appreciable amount is to blame on climate change now or in the future. All the African nations starving for want of local food production lack it for the same reason, violence and instability. From this point forward referenced as 'men with guns'. The people in Africa have, or at least had, the means to grow their own food. Despite your insistence that men with guns couldn't stop them from eating then, they still did and continue to. A farmer has to control his land for a whole year to plant, raise and harvest his crop or his livestock. Trouble is men with guns come by at harvest time and take everything. In places like the DRC or Somalia they rape the farmer's wife and daughters too. This has been going on for decades and decades, and it obviously doesn't take many years for the farmer to decide it's time to move their family, if they are lucky enough to still be alive. That is the population make up of all the refugee camps of starving people wanting for food. It's not a climate change problem, it's a people are horrible to each other problem. A different climate, better or worse growing conditions, is a tiny and hardly worth noting dent in the real problem.
CO@ emission restrictions do not equate to global economic downturn, they could just as easily mean global economic upturn as new tech is adopted and implemented.
I stated meaningful CO2 emission changes. That means changes that will sway us to less than 1 foot of sea level change by 2100 and corresponding temperatures. Those are massive and rapid reductions, and I'm sorry but that can not be an economic boon too. I'm completely confident that electric cars and alternative or fusion power will have almost entirely supplanted fossil fuel usage before 2100, and because they are good business. Pushing today though for massive emission reductions can only be accomplish be reducing global consumption. People don't like that, and they jump all over any excuse to go to war if it means lifting those reductions. That's just the terrible nature of our species.

As for glaciers, I did read the article. You'll notice it observed that increasing the spatial resolution of models changed the picture entirely? The IPCC noted this and updated their findings accordingly as well(page 242). The best guess by 2100 is better than 50% of the glaciers through the entire range remaining. The uncertainty range even includes a potential, though less likely GAIN of mass:
. Results for the Himalaya range between 2% gain and 29% loss to 2035; to 2100, the range of losses is 15 to 78% under RCP4.5. The modelmean loss to 2100 is 45% under RCP4.5 and 68% under RCP8.5 (medium confidence). It is virtually certain that these projections are more reliable than in earlier erroneous assessment (Cruz et al., 2007) of complete disappearance by 2035.

If you still want to insist Nepal will be without glaciers in 2100 please provide a source of your own or stop insisting on contradicting the science to make things scarier.

Umm. Wheels work pretty good. Unless this thing can chase after a train on open ground so I can save Doc's girlfriend, I don't see the benefit. But for 300 bucks I get the chance to figure out a purpose for it. No thanks.

Moving buildings? Wtf is he talking about? It sounds like a jet engine just barely holding a person. And what's going to power that? Mr. Fusion?

Ahhh yes, the Culture / Star Trek / super happy awesome future ending.

It's possible this may come to pass. I'd love to think that we may even see the beginnings of it in my lifetime.

The way I look at it, there are essentially two issues that need solving.

1: population growth needs to actually reverse. Ideally over the next few generations, the population would drop by a few billion. (note for the idiots in the crowd, I'm not talking about genocide or some draconian laws, I mean simply that people will choose to have less kids and the population will drop naturally).

2: energy. We need fusion. There are no two ways about it. We either develop fusion or we abandon our energy rich lives (cars, electronics, media, home appliances, etc)

Both of these are tough tasks, but with enough political will and some ingenuity, they are not insurmountable.

I am simply not that optimistic that we as a species can get our shit together enough to see this come to pass. Collectively, we can pretty terrible at adapting to change... just look at the media or transport industries for an example.

Any new economic model will meet with extreme resistance.

@RedSky

I'd like to know how you expect to quintuple the availability of every vital resource in the next 50-100 years while somehow reducing the environmental impact of that necessary increase to what you acknowledge needs to be less than the present level. This is supernatural thinking. Corporations don't pollute, incidentally, the fundamental structure of our global society pollutes; which would be no problem whatsoever if there were fewer of us.

It's fine if you'd prefer to just keep the majority of the world in mediaeval poverty, or alternatively impoverish everyone equally; colossally immoral, but by contrast actually physically possible.

Our success as an organism has been implicitly tied to energy availability for our entire history. The bubble of economic and technological advancement we've ridden since the industrial revolution is driven by unprecedented access to energy in the form of irreplaceable fossil fuels. It requires continual investment of energy to maintain. The practical exploitability of wind, solar, wave, geothermal and hydroelectric sources combined doesn't come close, not even close to the demand we'll place on them with population on the scale you're quite comfortable to allow. Fissile materials are limited and similarly irreplaceable; we've been steadily failing to develop fusion power for sixty years.

The innovation of new sources of energy is not guaranteed, unless you have some new breakthrough in physics you'd like to share? Efficiency gains are strictly limited.

If you think we'll have the ability to support billions of people on a sustainable basis at some time in the future, well great, LET'S WAIT UNTIL WE HAVE THAT ABILITY BEFORE WE BET EVERYTHING ON IT.

Nah, you can fart all you want... into a gas bag which will capture the methane and use it to power your home

But yeah, we are coming to the end of the cheap energy age.

Fusion or bust!

Well, helium is the product of fusion. However, even if we found some "cheap" or "cold" way to fuse hydrogen into helium, I dont think it would be cheap enough to produce useful amounts. Ie producing enough energy to keep a light bulb on for 300 years will produce 1 balloon full of helium. (http://imagine.gsfc.nasa.gov/docs/teachers/hera/spectroscopy/snr/fusion_calculation.html)

Or a reason to figure out practical fusion reactors. Isn't helium a byproduct?

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