How can they say climate change is man-made?

See? You figured it out. Now why can't Gore? Oh wait, maybe it's because he's making millions off his environmentally-friendly c*** he's selling. Hmm, conflict of interest much?

BTW, the guy who founded The Weather Channel said global warming was "the biggest hoax in the history of mankind." Pretty sharp words for a guy with a scientific background, as opposed to Gore's complete lack of scientific background.

It is undisputed that humans are pumping many times more greenhouse gases into the atmosphere than has occurred naturally for several million years.

It is undisputed that greenhouse gases trap more of the sun's energy in the atmosphere and retain it as heat.

It is undisputed that the global temperature trend has been ticking up in direct relationship to the start of the industrial revolution and the accumulation of man-made greenhouse gases

It is undisputed that rising temperatures melt ice caps, glaciers, and sea ice, expanding the oceans, and change weather patterns.

It is undisputed that a warming planet produces far more loser than winners since the main effect is a rise in sea level and most of the worlds population lives in low lying coastal areas.

A preponderance of the evidence suggests that man-mad green house gases are contributing to the warming of the planet.

A preponderance of the evidence suggests that the warming can be slowed, stopped, or even reversed by cutting or eliminating greenhouse gases.

It is undisputed that slowing, stopping or reversing the warming will have huge advantages over the alternatives. At the very least it will allow several more generations to live and farm where they do now. At the very most it will avoid human and economic catastrophe of unimaginable proportions

Yes. The climate has changed allot over the millennia and human caused carbon emissions are a fairly recent phenomenon. That doesn't mean they aren't serious. You mentioned cars which contribute millions of tons of co2 every year, the "etc." in your details would include massive deforestation and desertification, methane and other greenhouse gasses from the meat industry, coal fired power plants, ever growing human population and more than I could list here. Humans may not be 100% responsible for climate change, but I think it would be safe to say that we're having a considerable effect.

What you must understand is that people who are trying to discredit scientific evidence are doing so because the evidence they are using reaches back millions of years of Earth's history. If you believe in creationism and that the Earth is only 10,000 years old, you must assume the climate change data is made up or wrong.

Al Gore is not mocked and derided because people believe he is trying to hoodwink the world. He is hated by fundamentalist Christians for using science to prove their literal interpretation of the Bible may be wrong. All that, "he is doing it to get rich" is just a smokescreen.

Research the data. Ask someone actually familiar with what it means to help you understand it so you can come to your own conclusions.

Because ALL biota has an interactive role with the environment and climate is part of this.

Please find and cite and Chemical or Physical Law that suggests that anthropogenic chemical alterations to the atmosphere has no subsequent thermodynamic effect.

In fact, every respectable scientist knows that humans are playing a major role in affecting climate.

It's something called "hard empirical evidence." Maybe if Republicans

did not think Jesus was a Founding Father and that SUV ownership

was a Constitutional right, they would understand this better.

Nobody is saying that it is entirely man made. What has been determined is that human activity has had a large effect on the current cycle.

Because they get their money from federal grants and they have to have a scare tactic to get more money otherwise it dries up if everything is normal---like global warming that has happened since the earth has had an atmosphere.

Because of Science:

and nobody is saying it's ALL man made... we're saying Man has made it more rapid and dangerous than it might be naturally.

Glaciers move.