A large meteorite took out the dinosaurs. Plenty of evidence of that.
Let's be clear that we're talking about climate here...not weather. And yes, climate has always changed and probably always will. I disagree with you that humans are not a cause. We are not the only cause but we are a significant one. The evidence that we are a cause is overwhelming. (Go to the IPPC site and read some of their executive reports.). But frankly, it's not climate change per se that is a problem. It's the impact of climate change on humanity. We've only been around for maybe a million or so years, so what occurred in pre-cambrian times, or any time before quaternary isn't relevant.
And yes, there are some scientists who disagree, and that's fine, as long as they have logical arguments to defend their position. Google Roy Spencer if you want to hear from one.
Yes a meteorite, that’s a natural occurrence.
I have tried to cut through the word salad on the IPPC site but I can’t find any.
If it’s not the change in the climate, but the impact on humanity why are we spending all the money on trying to control/change the climate. Wouldn’t our efforts be better used to help humanity.
I’ll look him up. You look up Joe Bastardi.
Joe Bastardi....let's review some of the things he has said.
1) That the world was warmer in the 1930's than it is today. The temperature chart earlier shows this to be wrong.
2) The human contribution of CO2 is too small to have any effect. First, it appears that he acknowledges that CO2 has an effect. And second, anthropogenic emissions are far greater than all of the other sources combined.
3) Global warming is caused by sunspots. If that were true we would see an increase in solar energy reaching the earth. But satellite measurements since 1979 have measured 1,362 watts per square meter of incoming radiation, plus or minus a half of a watt. That seems pretty constant to me.
4) CO2 does not cause global warming because it doesn't mix well in the atmosphere. This is easily verifiable, but unfortunately every measurement of the atmosphere renders more or less the same result...CO2 molecules are easily distributed.
5) CO2 radiative processes are different from the rest of the atmosphere so it cannot cause global warming. It's partly true that CO2 radiative processes are different, at least from O2 or N2 which make up the bulk of the atmosphere. They don't absorb or emit radiation and are therefore not considered GH gases. CO2, H2O and CH4 are the main GHG's.
So who would I believe? Joe Bastardi who seems unable to read a global temperature chart or this guy who has many scientific awards and over 200 scientific publications?
en.wikipedia.org/wiki/Michael_E._Mann
Re: Dr Roy Spencer - This part of his site shows the global satellite data collected since 1979.
www.drroyspencer.com/latest-global-temperatures/.
