Global warming and emission of Green house gases is much more complicated than CO2 emission. Do you know Methane is also a green house gas and is emitted by vegitation. Green house gases only keep our planet warm. It is very difficult to maintain the ecological balance and any overdrive will tilt it. Even planting too many fast growing tees will deplete the earth of minerals etc. Burning carbon is the natural way of obtaining energy, even our body does that (cabon from food, oxygen from air and out goes CO2). Basically we are over poputated. Reduce the human population to 30% - 40% of todays and all problems will disappear