Reforesting

Environmentalists fight for a lot, for closing down nuclear power plants, coal-fired power stations and protecting flora and fauna from the influence of man - while, besides, they're the social group least to be expected, with all their networking for coordinating actions, to give up using new technological devices to be not in need of that much electricity production.
And where are they if it's about reforesting woods, so that there's still air left to breathe?