Amerika

Fossils from the mid-Pliocene epoch reveal a far warmer planet with a concentration of carbon dioxide in the atmosphere of only about 5 percent more than exists today, said Harry Dowsett, a U.S. Geological Survey scientist. A reconstruction of the climate 3 million to 3.3 million years ago shows slight increases in CO2 may produce large temperature changes, he said.

Bloomberg

Should be interesting, since things are converging: climate change, pollution prevalence, nuclear proliferation, rise of new industrialized nations, religious-national-ethnic-values extremism, fish stocks falling, lack of open land, oceans acidifying, etc.