What would happen to the earth's average temperature without greenhouse gasses?

Answer 1

A 1% decrease in ozone will result in a 1.2% increase in UV-B from the Sun arriving on corneas, and the DNA of all surface dwelling creatures. There would be a statistically difficult to pin-down increase in cataracts, melanomas and other cancers, and famine (loss of arable land and/or loss of viable crops).

Answer 2

Greenhouse gases include carbon dioxide and methane. At natural levels, they keep the earth's temperature at a comfortable level suitable for human existence. Climate scientists say that a reduction in the amount of these gases in the atmosphere would result in fairly rapid global cooling, while an increase results in higher global average temperatures - global warming.

A:Reductions in greenhouse gases would not have any effect on global temperature for thousands of years. The most abundant and significant greenhouse gas on earth is water vapor which accounts for 95% of the greenhouse effect. The body of science shows that global temperature changes occur over a thousand years before any changes in CO2 levels, so if there was a significant change in greenhouse gases, the effects would take millennia to be seen. A:Confusion is massive and prevents any appropriate action on this issue. Water vapor is a short term greenhouse gas. The sun warms the ocean and turns the water into a gas (water vapor). That gas over the next few days will rise up into the upper atmosphere where it cools. As it cools, it gives up its heat in the upper atmosphere and returns to a liquid and falls as rain. Much of the heat in the upper atmosphere is lost into space.

Some people believe that more solar radiation will release more water vapor and as it takes that heat into the upper atmosphere it will lead to global cooling. In their view the earth is undergoing a cooling period not warming.

Carbon dioxide behaves differently. Again, sunlight hits the earth and warms it. Carbon dioxide receives this heat and reflects (re-radiates) it back down warming more earth. In effect, carbon dioxide traps the heat, keeping it on the earth and warming it more.

If people were able to reduce the greenhouse gases carbon dioxide and methane in the atmosphere, there would be more ice on the ice caps and on the glaciers and sea level would fall.

Answer 3

Without greenhouse gases, the Earth's average temperature would be significantly colder, as greenhouse gases like carbon dioxide and water vapor trap heat in the atmosphere. The absence of these gases would lead to a much colder climate, similar to what is seen on Mars or the moon.

Answer 4

Near zero net effect. Ozone is a very small player as far as greenhouse gases go. Absorption of UV-B in the stratosphere vs. in the soil / ocean will add little to low level heating.

Answer 5

without green house gases the earth's temperature will decrees n it would be way colder than now

Answer 6

If the temperature decreases, ozone depletion will increase. It is because it accelerates at low temperature.

Answer 7

The average temperature would rise.