Anti-market environmentalists are fervently and illogically against technology. New discoveries are viewed with suspicious alarm. Blaming mankind for the Earth's ills, they are remarkable in their misanthropy. Several are on record supporting policies which result in greater human death. Until such time as Homo Sapiens should decide to rejoin nature, some of us can only hope for the right virus to come along.
People are the cause of all the problems.
We have too many of them. We need to get rid of some of them, and this is as good a way as any. Malaria, cholera and dysentery kill millions in the undeveloped nations of the world. In their view, it's actually a benefit when people die - the more the merrier. Certainly, it is better that the great unwashed masses die off - leaving the planet and its' resources to the infinitely more qualified and more deserving environmentalists.