Here's why I don't trust scientists: They're human and have agendas and are willing to bend the truth to fit their agenda.
There's an article in the Sunday Telegraph describing just how the scientists and bureaucrats of the UN massacred the global warming data to create a global panic.
You probably are familiar with the hockey-stick graph of worldwide temperatures, where the temperature goes up and down, more or less level, then abruptly shoots up in the twentieth century.
The top graph is from the UN's report of 2001. The bottom graph is from the UN's report of 1996. Notice anything different? Well, here's how they got from one to the other:
• They gave one technique for reconstructing pre-thermometer temperature 390 times more weight than any other (but didn't say so).
• The technique they overweighted was one which the UN's 1996 report had said was unsafe: measurement of tree-rings from bristlecone pines. Tree-rings are wider in warmer years, but pine-rings are also wider when there's more carbon dioxide in the air: it's plant food. This carbon dioxide fertilisation distorts the calculations.
• They said they had included 24 data sets going back to 1400. Without saying so, they left out the set showing the medieval warm period, tucking it into a folder marked "Censored Data".
• They used a computer model to draw the graph from the data, but scientists later found that the model almost always drew hockey-sticks even if they fed in random, electronic "red noise".
That all sounds scientifically honest, now doesn't it?
There's more. The sun heats and cools in cycles. It's currently in a very hot period. I won't bore you with the numbers (they're in the link), but here's a summation: "The entire 20th-century warming from all sources was below 2 watts. The sun could have caused just about all of it."
And they've also messed with the laws of thermodynamics. Has anyone heard of the Stefan-Boltzmann law? Well, apparently there's a little lambda in that equation that equals hc/ukT. A simple version of the equation is E=(sigma)T^4. The lambda is partially in the sigma, I guess. In any case, T is temperature. If you know the temperature and size of a body, you know how much it's radiating, and lambda to boot.
(In case you cared, Boltzmann is the Austrian who committed suicide because nobody believed him when he said that atoms existed.)
So the centuries-old method of calculating lambda gives you 0.2-0.3 deg C/watt. Guess what the UN's computer models use? 1.0 deg C/watt. Why? Because it fits their agenda better. Some "scientists" have used 1.9 deg C/watt just to scare you better.
And here are the concluding lines from the article, just because I can't say them better:
Removing the UN's solecisms, and using reasonable data and assumptions, a simple global model shows that temperature will rise by just 0.1 to 1.4C in the coming century, with a best estimate of 0.6C, well within the medieval temperature range and only a fifth of the UN's new, central projection.
Why haven't air or sea temperatures turned out as the UN's models predicted? Because the science is bad, the "consensus" is wrong, and Herr Professor Ludwig Boltzmann, FRS, was as right about energy-to-temperature as he was about atoms.
And no matter how much power we give to the UN and how much we destroy our economy with crippling regulations, we are not going to reverse the trends of nature.