We all know that periodically the climate has changed in the world.
We also know why the climate has changed and we know that different events can effect the climate.
What we do NOT as yet KNOW, (but certainly some of us suspect) is that mankind's industrial pollution is now causing the climate to change.
Just because the climate changed due to non-manmade events, does not mean that mankind's activities might not also be able to change our climate.
Life itself has changed the world's atmosphere many times and the climate changed as a result of LIFE the chemical composition of the atmosphere.
During the Caroniferous, both temperature and CO2 were much higher than today and then both reduced to levels similar to today while the level of oxygen rose to a very high level.
Insects the size Futons crawled around giving rise to the Orkin-iferous period during which they were systematically killed off.
Okay, I made that period up.
The reason the insects got to be so large was that in the very oxygen rich air they could take in enough oxygen to support their limbs. Today, they cannot so their size is limited.
The atmosphere changes and we can have some effect on it, but the world operates the way it does and if we cause enough aggravation the world will simply shuck us off as it did with the big bugs. However, as happened with the big bugs, things might just change around us to the way things have been for the majority of the world's history and we will suffocate in the poisenous air.
The way things are right now is an anomoly compared to the way things usually are around here.
Planetary Temperature and Atmospheric Carbon Dioxide (CO2)