From someone much better informed than me:
he big issue is not really whether the earth is warming or cooling, or if the climate is changing. All those things are happening now, just as they have happened in the past, and will continue happen in the future. Whether the temperature trend shows warming or cooling is entirely dependent on the time period we look at, ie: years, decades, centuries, Milena, millions or billions of years.
The BIG ISSUE is that some people say and many believe that it is mankind's activities that generate CO2, that are the cause of warming and climate change, AND that these activities must be stopped.
Despite $50B spent over the last 20 years, there is no scientific evidence that links CO2 to warming, but there is substantial evidence that proves that CO2 increases happen after warming periods (about 800 years later). Another fact is that mankind's contribution to CO2 is only about 3.8% of the total increase with the rest coming from the oceans, geological activity and decaying plant/animal matter. It is a fact that CO2 is not a pollutant, but a critical component for life on earth and in fact food for nearly all plants, which is why for a 100+ years farmers have pumped their greenhouses up with CO2 to increase the size and rate of crop growth.
The day will come for the Man-made Global Warming fear-mongers - should they actually plunge the world in to economic decay in an baseless attempt try to take us back to "year zero" to fix a problem that does not exist.
These idiots would have as much chance of stopping global warming as they do stopping the the wind from blowing.
What has been happening to temperatures over the last century?
1900s-1940s - temperatures increased substantially.
1940s-1970s - temperatures decreased substantially.
1970s-2000 - temperatures increased substantially.
2000-now - temperatures have decreased substantially. (now at levels of the late '70s)
For the last 150 years since the end of the "little ice-age" the level of atmospheric CO2 has been on a very steady and constant increase. But there is no correlation with temperatures levels of that period. However increasing and decreasing temperatures strongly correlate with our sun's sun-spot activities.
These are the facts.