Planting trees to counter carbon emissions won't work

[Black Aeronaut]

Yeah, photovoltaics are the way to go. Especially if you combine modern, advanced solar cells with the new advances they've had in hydrolysis - you can now run your own little hydrogen plant in your own home, running off nominal electricity and using ordinary tap water (though it'd probably be a good idea to run it through a reverse osmosis filter first to cut down on the minerals).

A company called HyperSolar is working on that right now, and they're very close to achieving their goal of commercially viable solar powered hydrogen production.