[lps41]

On a similar note:

The period leading up to the Black Death in Europe was a warmer climate than usual, allowing agriculture to expand and populations to explode. Deforestation was widespread as agriculture expanded.

There is a theory that the immense depopulation caused by the Black Death also allowed significant reforestation to occur in Europe, which in turn led to increased carbon capture from the atmosphere, and perhaps helped cause the Little Ice Age that began in the 1500’s.

http://news.bbc.co.uk/2/hi/science/nature/4755328.stm

[dan-robertson]

There’s a similar theory based on reforestation of land that was previously cultivated by the Mayans after their population collapse.

[CMCDragonkai]

The little ice age helped the collapse of the Ming Dynasty in China.