Government policy has a LOT to do with this issue.
IF there were huge tax credits for say.....home methane production, you'd see more of it.
Likewise, an increase in the tax on fuel for cars would tend to decrease the amount used and 'push' those who could afford it, toward higher mileage cars.
One factor in all this 'green' stuff I've not heard mentioned is the environmental cost of this conversion. Solar Cells, for example, are manufactured using many of the techniques also used by semiconductor manufacturers. The material used for these cells is CZ grown silicon which is a very energy intensive process.
IF there were huge tax credits for say.....home methane production, you'd see more of it.
Likewise, an increase in the tax on fuel for cars would tend to decrease the amount used and 'push' those who could afford it, toward higher mileage cars.
One factor in all this 'green' stuff I've not heard mentioned is the environmental cost of this conversion. Solar Cells, for example, are manufactured using many of the techniques also used by semiconductor manufacturers. The material used for these cells is CZ grown silicon which is a very energy intensive process.