When did global warming start becoming an issue?
%26quot;An even larger amount of carbon dioxide (CO¸2) would also have been expelled by Traps volcanism. But in contrast to the sulfate aerosols, carbon dioxide remains in the atmosphere for extended periods of time (centuries), though it decreases slowly over that interval. As a greenhouse gas, it warms the atmosphere, changing ecological conditions. (Deccan Traps volcanism, coming before the end of the Cretaceous, is estimated to have warmed the world by 3° to 5°C, or 5.4° to 9°F; Ravizza and Peucker-Ehrenbrink, 2003.) And because it combines chemically to form carbonic acid, it also produces mildly acidic rain. Acid rain can dissolve calcium carbonate shells, particularly those at or near the ocean surface. Additionally, acid rain leaches vital nutrients from the soil, resulting in plant stunting and death.%26quot;

The progression in scientific understanding on the current global warming is summarized in detail on this site:
http://www.aip.org/history/climate/co2.h...

In 1895 a Swedish scientist first proposed the hypothesis that if %26quot;humans%26quot; keep releasing carbon into the atmosphere we will eventually warm the globe up.
The %26quot;global cooling%26quot; hypothesis was proposed in the early 1960%26#039;s and was proven a theory by the end of that decade. Global cooling is based on the fact, there were no pollution controls going on, that allowed large amounts of particulate matter into the atmosphere and also other compounds like aerosols, that were actually blocking out solar radiation.

When governments realised that they could use this to control and scare the populous and also make some cash back on it at the same time ....Nice one eh !!

When the liberal parts of society needed something else to blame humanity with. When I was younger, they tried the fimbulwinter issue - turned out we were in the midst of a warming spell. They tried the hole in the ozone thing - turned out it was a naturally-occuring phenomenom that ebbs and flows. They then tried the El Nino problem - turned out it was also a natural issue that ebbs and flows. Now they%26#039;re trying for global warming, but they%26#039;ll be wrong about that also.

Read the latest in science headlines - most solar scientists think we may be in for a %26quot;minimal ice age%26quot; because it looks like we%26#039;re entering another %26quot;Maunder minimum%26quot; era.

Well i know global warming started around 100+ years ago.. they realized that the world temperatures were rising around 40 years ago.. and people were starting to take it more seriously around 10 years ago!!

I was informed that heat dissipated therefore the earths core was cooling. So I take it it is the greenhouse effect that is %26quot;warming%26quot; the globe. I am sure that the world saviours The great old U.S. of a will find a way of making a hole in the green house

I think it%26#039;s always been an issues it%26#039;s just that it%26#039;s only now that we are starting to acknowledge it and seriously do something about it.

Although have you noticed that is only the public that are encouraged to take action not business%26#039;s%26#039;? There is no legislation stating business%26#039;s have to recycle or will be charged for the amount of rubbish they throw out!

It became an issue for me when proponents began pushing for legislation to control and tax me. So much for the separation of church and state...

2005

if you read scientific reports, these guys realised that the natural process of melting and re-freezing of the ice caps wasnt happening. well, it was melting, but not refreezing, then the CO2 levels were measured, and by using the antarctica ice, the scientists measure the co2 from like 100 thousand years ago. they also measured global tempurature over the last 100 years. when they realized that there was a connection, they went to congress, but were laughed at and then lost their careers becuase they were called crackpots. however, more and more scientists have seen the same connection. we call it global warming. natural CO2 levels have been able to balance by plants sucking it up. but with all the co2 from trucks, trians, cars, planes, boats, factories, and houses has been overwhelming and theres not enough plant life to get rid of all of it. so it thickens the atmosphere and heat from the earth cant evaporate out into space. kinda like puttin a lid on boiling water and welding it on.

When the political Left realised they could gain power, control and tax money by making it an issue.

It depends what you mean by %26quot;issue.%26quot;