Concentration of greenhouse gases, especially CO2, have increased substantially since the beginning of the industrial revolution. And the National Academy of Sciences indicates that the increase is due in large part to human activity.
It began early in the revolution. It was a process that was unfolding on a daily basis. We expected the system to be dispensing justice, but every day that passed by, we recognized that the justice we expected and hoped for was not about to be achieved.
It is curious - but you cannot make a revolution without honest men. ... Every revolution has had its honest men. They are soon disposed of afterwards.