I have a solar powered heater in my house, here is how it works:
All summer the trees arround my place grow and grow, the sun (or solar rays to be exact) hits the green leaves and causes a chemical reaction with the carbon dioxide in the air, the carbon is turned into a solid and stored in the trunk.
After 10-30 years I use my solar powered saw to cut the trees up into 10-14" legnths, then dry them (or not) and toss them into my solar heater, hereafter known as SH, WS, or Wood Stove, and a second chemical reaction both heats my house and replenishes fresh carbon dioxide to the trees.
Kinda neat, huh?
Oh, the solar saw works the same, but the dinasaurs ate the trees or grass, then decomposed and I use their oil in the saw.
See, I'm doing my part, what about you?
