Giardiasis said:Because it is very expensive and does not supply base load power.
A) The whole point of an ETS is to put a price on pollution to promote incentives for solar energy research research.
b) The whole base load issue is a bit of a furphy. Firstly, solar power proponents reckon base load capacity is possible now, or not far off, and also even if so called 'base load' power isn;t possible, promoting solar would still greatly reduce the need for base load coal, which is still a win.