Re: Acts/ Dictates/ Mandates/ Mantle - Amy's Thread
Actually, CO2 has been at least twice as high as it is now.
Increasing CO2 levels reduces water loss in plants as they collect CO2, annd will reduce the demand for agricultural water.
The worst overfishing was by the centrally planned USSR that would not join other fishing nations in agreeing upon a sustainable catch. This is what nearly wiped out the north Atlantic cod.
The worst industrial air pollution was by the centrally planned USSR and the Warsaw Pact nations, though China is taking up that mantle. The worst nuclear pollution was from the centrally planned USSR.
Agree with you on the food supply chains. A new Dark Age (when we forget what we knew) would kill 90+% of the industrialized world, and will be a death spiral because of all the specialties needed to preserve the ability to produce. (I suspect that you need at least a million people free of other burdens to preserve the expertise. See =I, Pencil=)
Acidification of the oceans is, IMO, the most reasonable of the fears out there. But it's not happening as fast as we expect.
When people live together in large communities, they create new habitats for disease.
The desire of some people to rule others by force, whether as warlords or as the LRA, or as the old ruling families of Haiti or Kim Jong the N+1th, or as 'enlightened' bureaucrats is the greatest threat to conservation and (truly) sustainable resource usage.
Communities in which individuals gain or lose by positive-sum or negative-sum behavior are shown to work. Rule by single-issue Tsar has been shown by history to make things worse.