When did major global warming start?

Answer 1

Human caused global warming probably started with the introduction of slash and burn farming, which was prehistoric.

I remember being told by a teacher, in 1957, that old-timers he knew said it was not as cold as it had been when they were young. Since old people are generally more sensitive to cold than youngsters, I think this was probably an accurate observation.

I was first warned about CO2 emissions having the potential to cause problems in the environment by a toxicologist in 1968. His observations were hypothetical at that time, even though the process of global warming had probably already begun.

Truth be told, the earliest global warming probably happened because cyanophyta put a lot of CO2 into the atmosphere, hundreds of millions of years ago.

A:The greenhouse effect has been keeping the earth warm for millions of years. But the global warming that the world is worrying about now started about 260 years ago, at the beginning of the Industrial Revolution (around 1750), when man started digging up coal and oil and burning it for industry, transport and to generate electricity.

This fossil fuel burning releases age-old carbon dioxidethat had been hidden underground for 300 million years. This extra CO2 is too much for the carbon cycle to deal with so it remains in the atmosphere, getting warmer and warmer as the months go on.