They're jMany environmentalist groups have built a cage of fallacy around themselves, they opposed Nuclear Weapons vehemently in the 1980's, and many of them still live in a world where 'Nuclear = Bad', regardless of how it is used (though I wonder if they would refuse Radiotherapy if it stood to cure them of cancer?). Because of this somewhat blinkered attitude, combined with increased Government control over Science, and increased Environmentalist control over Government, they could end up screwing things up for us in the name of saving us.
As someone mentioned earlier, they live in a happy cloud land where wind and water will provide all our energy needs, and yet are often amongst the first people complaining about wind farms etc destroying the coastline, or killing bats.