What is the argument of the people who don't think global warming is caused by humans?

Answer 1

common sense...

Answer 2

The following is the summary of an abstract on Environmental Effects of Increased Atmospheric Carbon Dioxide. The entire paper can be found at the source link and I believe that it answers you question.


Summary
World leaders gathered in Kyoto, Japan, in December 1997 to consider a world treaty restricting emissions of ''greenhouse gases,'' chiefly carbon dioxide (CO2), that are thought to cause ''global warming'' severe increases in Earth's atmospheric and surface temperatures, with disastrous environmental consequences. Predictions of global warming are based on computer climate modeling, a branch of science still in its infancy. The empirical evidence actual measurements of Earth's temperature shows no man-made warming trend. Indeed, over the past two decades, when CO2 levels have been at their highest, global average temperatures have actually cooled slightly.
To be sure, CO2 levels have increased substantially since the Industrial Revolution, and are expected to continue doing so. It is reasonable to believe that humans have been responsible for much of this increase. But the effect on the environment is likely to be benign. Greenhouse gases cause plant life, and the animal life that depends upon it, to thrive. What mankind is doing is liberating carbon from beneath the Earth's surface and putting it into the atmosphere, where it is available for conversion into living organisms.

This is a complex subject and is far to long to answer with a short responce within Yahoo/Answers

Answer 3

The globe has warmed and cooled for centuries, even before there was car exhaust or aerosol cans. So no one can say for sure what the cause of global warming or cooling is, and the global warming "remedies" proposed by environmentalists hurt business and the economy. Suspiciously the remedies only hurt the USA.

Answer 4

One good answer is that the sun is causing global warming (if there is such a thing). The earth goes through heating and cooling phases, as natural occurrences. It's certainly not the (low) level of CO2 in the air, that's causing the earth to warm up.

Answer 5

Since we don't have detailed weather statistics before the late nineteenth century, we have to rely on historical accounts of weather-related phenomena in other works. There are mentions of eras of abnormally high or low temperatures before the industrial revolution.

There is also the memory of the older generation of the same sort of emotional hysteria over our entering another potential ice age a couple of generations ago.

Answer 6

The climate goes into cycles. And that is normal.

No humans around when we came out of the ice age, and thank God for that global warming.

Answer 7

there was an ice-age right?what melted all of that ice ?global warming!the globe warms up and the globe cools down, and that is the natural scheme of things.

Answer 8

The FACT that the ocean creates more o-zone and greenhouse gasses in a single day then the entire world does in months.

Answer 9

Send them to Kiluminjaro (sic) or look at the temp graphs since the start of the industrial revolution.

Answer 10

That it's a natural occurance!