Actually, many scientists disagree on what is causing the warming. And I'm a hard science advocate (don't ever engage me on topics like anthropology classification and cosmology).

The favorite line of the detractors now is ,OK the world is warming but we don't know if it manmade or natural...
 What does that mean?? Does it mean theres a chance we didnt cause it so we wont try to stop putting the crap into the atmosphere that very likely is causeing it?

Mars Melt Hints at Solar, Not Human, Cause for Warming, Scientist Says  
Kate Ravilious
for National Geographic News

February 28, 2007
Simultaneous warming on Earth and Mars suggests that our planet's recent climate changes have a natural—and not a human-induced—cause, according to one scientist's controversial theory.

Earth is currently experiencing rapid warming, which the vast majority of climate scientists says is due to humans pumping huge amounts of greenhouse gases into the atmosphere.

Mars, too, appears to be enjoying more mild and balmy temperatures.

In 2005 data from NASA's Mars Global Surveyor and Odyssey missions revealed that the carbon dioxide "ice caps" near Mars's south pole had been diminishing for three summers in a row.

Habibullo Abdussamatov, head of space research at St. Petersburg's Pulkovo Astronomical Observatory in Russia, says the Mars data is evidence that the current global warming on Earth is being caused by changes in the sun.

"The long-term increase in solar irradiance is heating both Earth and Mars," he said.

Solar Cycles

Abdussamatov believes that changes in the sun's heat output can account for almost all the climate changes we see on both planets.

Mars and Earth, for instance, have experienced periodic ice ages throughout their histories.

"Man-made greenhouse warming has made a small contribution to the warming seen on Earth in recent years, but it cannot compete with the increase in solar irradiance," Abdussamatov said.

By studying fluctuations in the warmth of the sun, Abdussamatov believes he can see a pattern that fits with the ups and downs in climate we see on Earth and Mars.

Abdussamatov's work, however, has not been well received by other climate scientists.

2.DOH, Abdussamatov just has failed to iron one little detail: he has not demonstrated that there's increased solar activity affecting Earth or Mars.

"The long-term increase in solar irradiance is heating both Earth and Mars," he said.

(Not to mention how our knowledge about Mars climate is slim, whereas Mars climate is pretty alien. You know, up there there are winds blowing at 350 miles an hour and dust storms covering the whole friggin planet for 2 years...)

Global warming: not just heat, but humidity

By SETH BORENSTEIN

AP Science Writer

WASHINGTON — The world isn't just getting hotter from man-made global warming, it's getting stickier. It really is the humidity.

The amount of moisture in the air near the surface — the stuff that makes hot weather unbearable — increased 2.2 percent in just under three decades. And computer models show that the only explanation is man-made global warming, according to a study published in Thursday's journal Nature.

"This humidity change is an important contribution to heat stress in humans as a result of global warming," said Nathan Gillett of the University of East Anglia in the United Kingdom, a co-author of the study.

Gillett studied changes in specific humidity, which is a measurement of total moisture in the air, between 1973-2002. Increases in humidity can be dangerous to people because it makes the body less efficient at cooling itself, said University of Miami health and climate researcher Laurence Kalkstein. He was not connected with the research.

Humidity increased over most of the globe, including the eastern United States, said study co-author Katharine Willett, a climate researcher at Yale University. However, a few regions, including the U.S. West, South Africa and parts of Australia were drier.

Is your point that we should not draw conclusions based on limited knowledge?