Perhaps unfortunately...I'm going to have to go with the 7 out of 10 saying NO.
Not because I think it is a bad idea, but because:
1. I don't trust the government to actually use the green taxes for green initiatives
2. Increase tax means increased civil servents to do "the paperwork" which uses up tax money that would better be spent on green initiatives
3. The government is already wasting millions funding unnecessary things (Olympics - which is also environmentally damaging!), benefit cheats et al not to mention the politicians overseas holidays (again environmentally damaging!)
4. Tax on fuel in the UK is already one of the highest in the world - and for what? Are you seeing well maintained roads or are the roads constantly being dug up adding to congestion problems etc? I don't believe the government are using the tax they are already getting effectively so I oppose giving them more money to waste.
5. I don't trust the government
6. The government is wasting money on those "eco-homes" when it would be better to spend that money on redeveloping brownfield sites and altering current homes to be more environmentally friendly
7. The government already has very poor green credentials in my eyes (Marine Bill anyone) so why should people give them more money to not put it to the use it is intended for?
8. I don't trust the government
I can probably think of plenty more - mainly due to not trusting the government to use any tax money effectively because I don't believe they are using the taxes they are getting now effectively. Oh, and I don't trust the government (if you hadn't already realised).