01-09-2016, 04:03 AM
The question is how did man cause those past global warming trends?
Human population remained under 1 billion until 1800 AD.
2 Billion - 1927
3 Billion - 1960
4 Billion - 1974
5 Billion - 1987
6 Billion - 1999
7 Billion - 2011
The answer to your question, is that most likely there were not enough people around in the past to affect the climate -- which obviously is also affected by factors other than human influence.
Human population remained under 1 billion until 1800 AD.
2 Billion - 1927
3 Billion - 1960
4 Billion - 1974
5 Billion - 1987
6 Billion - 1999
7 Billion - 2011
The answer to your question, is that most likely there were not enough people around in the past to affect the climate -- which obviously is also affected by factors other than human influence.
"I'm at that stage in life where I stay out of discussions. Even if you say 1+1=5, you're right - have fun." - Keanu Reeves