it is not being pursued because it has the potential to create jobs, get people off food stamps, unemployment and dependency on govt and boost our economy, all of which goes counter to the liberal left agenda of making the united states just another mediocre member of a one-world govt, distributing the wealth after govt is in charge of everything. i know most moderate democrats will not believe this, but study Agenda 21. the green movement, sustainability, etc etc are all buzz words for worldwide regulations, giving up our national sovereignty, our property rights, and our individual rights in favor of the collective "good".