Greenpeace are a bunch of idiots whose misguided, extremist views polarize others against the environmental movement - the bitter irony is that they often advocate courses of action that'd result in greater harm to the environment.
Cases in point:
They advocate for the shutdown of all nuclear plants. Germany did, and look at the results: despite all their talk about renewables, they ended up replacing their clean nuclear plants mostly with BROWN COAL, the dirtiest fuel there is.
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The anti-GMO crowd is kind of cartoonish.