I hang out with the Sierra Club now and then.  They are nice folks (even if they have a strange aversion to LNG), and it's fun to get out and hike.  I think a lot of environmental groups have roughly parallel goals to those with energy concerns (cue the geo-greens).
Environmentalists are, unfortunately, another group of people who 'don't get it'.

They worry about global warming, but oppose LNG.

On nuclear, the case for opposition is stronger (nuclear is not economic without big government subsidies), but still they refuse to discuss it and blame respected scientists as being in the pockets of the nuclear industry.

They talk about biomass, but much biomass will actually make the CO2 problem worse (eg the Brasilians).

Here in the UK there is massive opposition to windmill farms because they 'despoil areas of great natural beauty'.

The reality is, the CO2 problem is closing in so fast, that all solutions have to be on the table.

And we have to move fast, we can't afford to have 5 year planning approvals processes for wind farms (the UK, currently).