what is bio-ethanol?

[EternalOptimist]

Where do plants get their carbon from i wonder?

most plants get most of their carbon directly from the atmosphere, they exhale oxygen. Most land animals get their oxygen direct from the atmosphere and exhale carbon dioxide. Aquatic species use a different method, mainly because they are under water

Carbon dioxide levels have increased dramatically, from a biologically dangerous low, and there is very good evidence that the planet is 'greening' as a result (which, ironically, the eco fascists are doing their best to stop)

[Robinho]

most plants get most of their carbon directly from the atmosphere, they exhale oxygen. Most land animals get their oxygen direct from the atmosphere and exhale carbon dioxide.

Incorrect, plant roots extract oil from oil reserves in the ground. This is how they get their carbon and how they get the energy to grow.