A few problems with hydrogen fuel cell technology:

1. Hydrogen production.
From what I understand, hydrogen is not found in any quantity on Earth, so they need to make it from water. This uses lots of energy and with our current energy production being mostly hydrocarbon we are just relocating the emissions from the tailpipe to the smokestack. It is still more efficient then internal cumbustion though.

2. Hydrogen distrobution.
We currently have a huge infrastructure of oil/gasoline storage and distribution. This would all have to be replaced though staged upgrades to hydrogen distribution. Also, isn't hydrogen very flammable?

3. Hydrogen car technology
Current technology is so behind other alternative forms of energy that it will take many years for it to be a suitable replacement to fossil fuel technology.

To me, battery electric vehicles are the best solution for the near term. The technology is fairly advanced. Lithium ion batteries are becoming more available and are cleaner and recyclable. We already have a great electricity distribution infrastructure right to everyones home for charging. As for the energy production side we would then be able to focus on moving away from coal and natural gas to wind, solar, geothermal, wave, etc.

I wish people would get a clue... God has nothing to do with anything. Except maybe in your imagination. So the 'all powerful creator of the universe' can't do something about spoiling meat, but the meat packing industry and FDA can by sticking a 4 Ford's tailpipe down the throat of a dead cow. LOL.

whaddya know, a budzos down vote.....
perchance an explanation, Dr.B??

The true volume of Mauna Loa is staggering when compared to other large mountains or volcanoes, experts say. For instance, it would take about 375 mountains the size of Mount Hood in Oregon, itself an 11,235-foot volcanic peak, to equal this gigantic volcano on the Big Island.

if just this one volcano's emissions are taken into account, well, fuck alll the tailpipes and Chinese and US factories combined...Einsteins.....

Looked more like the deer was pissed at all the loud tailpipes and decided to try and take one out.

Man he looks tired....it's hard, it must be, running around the globe advocating shut-down. Again, please, most agendas are multi-faceted, and surely, Gore's motivation is partially sincere, in his dire and grave scenario of Carbon dioxide: "The evil gas"
The plaentary emergengy he speaks of is real- and it is grave-a grave he will dig for us all if he wins over the hearts, and emotions of those who deny real issues...The real issue of the mechanism that is defective, exclusive, and still alive-We are headed for planetary change, but nothing as linear as us slowly polluting ourseves.....this is the pollution that may kill us-the masters of disinformation, like Gore, like Raytheon, like HAARP staff/Navy Dept.

The climate crisis, the possibility exists, is cyclical.....not to mention the core samples of the ice shelves, sea-floors, and datum that point to a massive eruption that fucked this planet up 75000yrs ago.

Make no fucking mistake! If Yellowstone, Etna and those assoc with her, or the magma chambers that Japan has under her , ever decide to pop......you may as well suck a tailpipe, or breath in a big healthy dose of free-silica from a sandbag, because humans are history....and not in some 1000 yr iteration, but BOOM!

When you hear Gore say some subjective bullshit like "These aren't normal times"
"What, Mr. Gore, does that mean?"

This poor guy-most poor folks-

However many millions of tons of C02 we dump, planet Earth dumps more!!!
One thing is certain.....We are all going to die.
Most likely, it will be from paying attention to diversion like this.

Stop Sunspots!!
Better than that, stop bullying yerself Al......

THE CAPS ARE NOT MELTING FROM CO2.......(..."AND THEY DON'T UNDERSTAND HOW IT IS DOING IT SO QUICKLY")GORES OWN WORDS.....WE DON'T KNOW, BUT SOME WOULD LIKE TO BLAME HUMANS-I blame humans for shiting in their own nest, and in their own brains.