There are literally green power sources, it's called plants. Plants produce all of the chemicals available in petroleum, and pull CO2 out of the air. After con

There are literally green power sources, it's called plants. Plants produce all of the chemicals available in petroleum, and pull CO2 out of the air. After converting the plants into methane, syngas or biodiesel you are left with the remaining carbon chain which can be used for soil building, thus "reverse mining" carbon from the air, putting it back into the soil. This can be done without using petroleum, or using land that would be used for growing food crops. It can also be done with food wastes like walnut shells, bigasse, or corn stover.