Research has shown that the temperature of the planet has risen over time but only by about 1 degree C. That doesn't sound like much but it can make a big difference.
What is more at question is whether the problem is man made.
You have a huge host of charlatans like Al Gore, one of the world's greatest hypocrites. He is totally invested in making money on things like the ridiculous carbon exchange scam. All of this while his personal electric bill exceeds that of 100 average Americans.
But the whole "green" thing is really a joke, there are no green jobs and very little in the way of green enterprises, I can't think of one at the moment.
Then you have president Obama who has blown over a Billion of our dollars investing into boondoggles over $500 million into a solar power company that went bankrupt in less than 2 years without producing anything and now 2 electric car companies 1 that make outrageously expensive Telsa cars, when the show Top Gear tried to test one they had to get 3 in order to have them run long enough to test. The other is a company that hasn't even made a functioning prototype and has taken the money and moved to Europe.
The whole electric car thing is a scam. They cost more to operate and cause the creation of more pollution that a good high mileage gas car.
If you really want to understand what is going on just follow the money.
The earth has gotten warmer and colder throughout time so it is really unknown just what causes it. We are having an impact no doubt but just how much is unknown.
On the bright side we will probably be killed off by something other than climate change; probably something of our own doing.