Hello, just wanted to comment on fuel cells, as some of the information posted about them isn't quite right. Fuel cells are not batteries, they are load-following electricity generators. As and when a fuel, in the case of hydrogen fuel cells, hydrogen, is fed into what is usually a stack of cells, electricity and H20 are created via a simple electro-chemical process (like the reverse of electrolysis). Hydrogen is not energy intensive to isolate except when it is reformed from hydro-carbons via certain methods (this is perhaps why certain people seem to be taking a shine to fuel cells right). In fact, Hydrogen can be obtained easily from solar panels & wind power with an electrolyser, but best of all, from waste. In a completely zero emission system, anaerobic digesters, pyrolysis and hydrogen fuel cells (pretty much in that order) can work in harmony to turn almost any waste into electricity and pure water in a closed loop in terms of the energy required to run each element. It's true that some fuel cells do use exotic materials, most all of them use platinum for example, and of course these being either mined or toxic materials are not friendly to people or the planet and should be avoided in clean energy solutions. Cenergie have developed a solution to this in a fuel cell system which uses only commodity materials and is 100% recyclable. If you'd like to find out more about fuel cells and clean waste to energy systems, have a poke around www.cenergie.com, it's cute and full of info. I can't comment on this man's technology, although given the state of our planet, we might champion technology which makes water, instead of burning it up. Power for peace, alkagirl*

Hello, just wanted to comment on fuel cells, as some of the information posted about them isn't quite right. Fuel cells are not batteries, they are load-following electricity generators. As and when a fuel, in the case of hydrogen fuel cells, hydrogen, is fed into what is usually a stack of cells, electricity and H20 are created via a simple electro-chemical process (like the reverse of electrolysis). Hydrogen is not energy intensive to isolate except when it is reformed from hydro-carbons via certain methods (this is perhaps why certain people seem to be taking a shine to fuel cells right). In fact, Hydrogen can be obtained easily from solar panels & wind power with an electrolyser, but best of all, from waste. In a completely zero emission system, anaerobic digesters, pyrolysis and hydrogen fuel cells (pretty much in that order) can work in harmony to turn almost any waste into electricity and pure water in a closed loop in terms of the energy required to run each element. It's true that some fuel cells do use exotic materials, most all of them use platinum for example, and of course these being either mined or toxic materials are not friendly to people or the planet and should be avoided in clean energy solutions. Cenergie have developed a solution to this in a fuel cell system which uses only commodity materials and is 100% recyclable. If you'd like to find out more about fuel cells and clean waste to energy systems, have a poke around www.cenergie.com, it's cute and full of info. I can't comment on this man's technology, although given the state of our planet, we might champion technology which makes water, instead of burning it up. Power for peace, alkagirl*