I absolutely agree. We need to be making sweeping changes which the tories will not make.
On the other hand, the tories are probably the least environmentally friendly of the 3 big parties in the UK, and their platform is massively better than the most environmentally friendly big party in the US, so at the very least we're further down the right track than some places.
I really hope the lib dems will be a voice of reason on environmental issues, but I nearly burst out laughing even picturing the lib dems having any kind of influence at the moment, so chances aren't exactly sky high.