What is the major source of global warming over centuries?

Question

What is the major source of global warming over centuries?

Answer 1

People, as a advance life form we have dug up the  waste that destroyed the earth in the first ice age that of coal and oil and pumped it back into the atmosphere. Basically the coal and oil are remainders of carbon where the volcano's blew it all into the atmosphere and created the first ice age as it blocked the sun. Now we dig up the same stuff and pump it back up there.

Answer 2

CO2 and greenhouse gases.

Answer 3

The sun. Today a report from all four temperature measuring institutes was released that said that the earths temperature decreased 1 degree last year, negating a century of increases. They agreed that it was due to solar effects on the earth. How about that! Man was left out of the science theory and furthermore, Man had no effect on the decrease

Answer 4

SUN and only the sun.

Answer 5

Oceans are the #1 constant source of CO2 with forests #2. Mt. St. Helens in 1980 released more CO2 in one day of eruption than the industrialized world in the last 100 years. We have also had Mt. Pinatubo, Fuji, Kilowa also erupting in the years since St. Helens that's just the ones I can think of off the top of my head.

Danni

Answer 6

Before about 200 years ago, it was the Sun.

Lately, it's mostly man made greenhouse gases.

In between, it was a mixture of both.

Answer 7

I blame it on the dinosaurs. They left us all of these carbon fuels to burn and pollute the atmosphere. It was very irresponsible of them.

Answer 8

Mainly it's people polluting the Earth by burning fossil fuels.

Answer 9

the sun

Answer 10

The sun.

Answer 11

industrial revolution cars and other stuff

Answer 12

The Beluga whale.

Answer 13

The sun. If it went out we'd be stuck on an iceball with just a few hours. Frozen seas, hundred foot snowdrifts in Los Angeles. It just may have an impact on us getting increasingly warmer. But we're still not as warm as we were before the Little Ice Age hit around 1600 AD. The temp has been climbing steadily since then, wait, no it hasn't, there have been cooling periods as well.

Currently human-produced CO2 is being blamed for the warming but there were no people to produce CO2 before the last Ice Age, little CO2 was being produced during the Medieval Warming Period which preceded the Little Ice Age.

How do AGW advocates explain this? They don't, instead they now claim it was only localized cooling and warming. How can parts of the world be so warm that they grow grapes and make wine in Nova Scotia and England, yet so cold just a few years later that the Thames froze solid, New York harbor froze and you could walk from Manhattan to Staten Island and so on? Why in the world would they want to distort clear historical evidence this way?

If we reduced CO2 levels too much, below about 300 parts per million (ppm), plants will no longer grow. From wikipedia Plants require carbon dioxide to conduct photosynthesis, and greenhouses may enrich their atmospheres with additional CO2 to boost plant growth, since its low present-day atmosphere concentration is just above the "suffocation" level for green plants." "Five hundred million years ago carbon dioxide was 20 times more prevalent than today, decreasing to 4-5 times during the Jurassic period and then maintained a slow decline until the industrial revolution." http://en.wikipedia.org/wiki/Co2

Since they produce a lot of the oxygen we breathe, that might be somewhat bad for us. Today the level is at about 383 ppm.

http://en.wikipedia.org/wiki/Image:Mauna...

This link shows CO2 levels at a mere 315 ppm as recently as 1960.

Below is a link to a chart that might put CO2 into a little better perspective. It shows CO2 levels 10 times higher (4,000 ppm) than they are now, during an ICE AGE. Also, CO2 levels far below the current level with much higher temperatures. The high point is 18 TIMES greater than today while temp was only 10 degrees C higher than today. We'd have to add an awful lot of CO2 to reach that level, since we only add a few PPM each year.

Answer 14

The sun being our source of heat most likely dictates our temperature. As it is not constant, niether is our climate. Man's pollution may have some effect on this, but not a significant one. The trend has apparantly shifted from "global warming" to "global climate change" because it is so cold. Some people are saying that the temperature will drop drasticaly, now, despite the so desparately alleged rise in temp.

If this is so and the earth will cool, does that mean we should be emitting as much pollution as possible to counter ballance the lack of heat being sent from the sun?

Probably not; just a thought.