Some scientists als contend that the clean up of major hydro-flora carbons and sulfuric dioxide from the upper tropesphere has led to increased insolation. Like volcanic ash, this man made pollution reflected sunlight back into space. By the early mid 60s, efforts were underway to clean up power plants and factories. Today, most power plants are either oil or natural gas. By the early 80s, the earth was enjoying increased insolation.

This theory hasn't been fully accepted, but does have some merit. Much of the cooling seen from 1946-1976 can be attributed to the Pacific Multidecadal Oscillation. It has been in a positive phase since 1977.

Hang on a minute. Eric the Red farmed in Greenland! The farms are now under permafrost. The Romans grew grapes and produced wine in Britain. People skated on the Thames. All things that occured prior to the Industrial Revolution.

"Man's effect over the last few decades" please. Let's really include what the sun does to the temperature unlike the unlikely UN models.

During discussions as to the causal factors of global warming I never see population of the earth as a possible causal factor. Since a human being generates about 2.2 lbs. of carbon dioxide each day I would think this is an important factor given the increase in global population during the past 100 years.

hi im angel. im just thinking about this global warming,temperature and weather issue that i've heard and read and im just wondering; this planet knows how to repair itself. like the ecosystems way of balancing the food chain. if this planet is going through a warming situation wouldn't it happen like the more heat is produced then more clouds will form which in turn will block the sun and as an effect lessen the heat thats being added on the planet by outside sources? if i were right it would seem to it like the clouds will be sort of a thermostat to keep the planet at the right temperatures.

I hear about this el nino warming the waters off hawaii . I want to know if any of the volcano activity in hawaii would be a cause of warming the waters for the el nino to make our weather to become different for our winters in the North eastern, here in PA?

As destructive and careless as man may be, I question his ability to so dramatically change his own climate. Are you sure it his he and he alone who is creating a warming of the earth?s entire surface? Do you think that for his next trick he will attempt changing his orbit around the sun? 2) Are you also sure that a little global warming isn?t exactly what this earth needs? Just wondering?

Are the spectral emission bands for near earth atmospheric CO2 saturated?

Would we have to double the amount of CO2 currently entering the atmosphere to cause more excitation of the CO2 molecules?

I personaly think that all we need to focus on is reducing polution. other than that the world knows what its doing. Let it work its magic and cool the earth.

my question is: why is there so much talk about global warming, but not so much of climate change? surely anyone who isn't an idiot must realize that if you look back at history when the earth started to get warm did humans have cars back then? no. so why are [most] scientists wasting time and even al gore talking on the news about global warming when even more than half of that should really be also of climate change and not just all global warming. sure there's polution and what not in the air now, but thats not what is causing some of the other changes around this planet. i, myself, do not agree with most of this "global warming" nonsense, i mean they said that 30 years ago you might as well tell people everyday that the earth is undergoing global warming. I think there should be more discusion about climate change as well, so far I've only heard it once from a scientist on the news.

I find it strange when people write quite confidently that we should somehow dismiss the conclusions of a large majority of people who have developed a real expertise in that domain.

Comments about people skating on the thames, the impact of cloud formation, the sun effect, etc.. without any nuances, are the work of dilettantish. Has anyone of them paid attention to the Sudden and Exponential character of gaz levels in the air, which coincides with the industrial revolution?? the sun appears as the ideal scapegoat for the irresponsible and lazy!

The ultimate of lazy and lack of resposibilty is when you simply accept someone else's opinion without doing any research yourself.

The Sun puts out 386 billion billion Megawatts per second. The Earth receives about 30 Quintillion watts per day. Even the slightest variation in that output is very signifigant.

There is nothing sudden or exponential about the additional 100 parts per MILLION in the levels of CO2 "gaz".

Take a moment or as long as it takes and study the three laws of thermodynamics, the amount of energy teh Earth recives, specific heats, convection, conduction, and radiation, and you will find that CO2 levels where they are today(380 ppm) are very insignifigant when comapred to the amount of water on our planet.

Regards,

Steve