Temperatures plunged to -22C (-8F) in parts of Argentina's province of Rio Negro, while snow fell on Buenos Aires for several hours on Monday.

Two deaths from exposure were reported in Argentina and one in Chile.

In Bolivia, heavy snowfall blocked the nation's main motorway and forced the closure of several airports.

'Scepticism' over climate claims BBC News 03/07

The public believes the effects of global warming on the climate are not as bad as politicians and scientists claim, a poll has suggested.

The Ipsos Mori poll of 2,032 adults - interviewed between 14 and 20 June - found 56% believed scientists were still questioning climate change.

There was a feeling the problem was exaggerated to make money, it found.

The Royal Society said most climate scientists believed humans were having an "unprecedented" effect on climate.

China overtakes US as world's biggest CO2 emitter John Vidal and David Adam Tuesday June 19, 2007 Guardian Unlimited

China has overtaken the United States as the world's biggest producer of carbon dioxide, the chief greenhouse gas, figures released today show.

The surprising announcement will increase anxiety about China's growing role in driving man-made global warming and will pile pressure onto world politicians to agree a new global agreement on climate change that includes the booming Chinese economy. China's emissions had not been expected to overtake those from the US, formerly the world's biggest polluter, for several years, although some reports predicted it could happen as early as next year.

But according to the Netherlands Environmental Assessment Agency, soaring demand for coal to generate electricity and a surge in cement production have helped to push China's recorded emissions for 2006 beyond those from the US already. It says China produced 6,200m tonnes of CO2 last year, compared with 5,800m tonnes from the US. Britain produced about 600m tonnes.

Global warming debunked By ANDREW SWALLOW - The Timaru Herald | Saturday, 19 May 2007

Climate change will be considered a joke in five years time, meteorologist Augie Auer told the annual meeting of Mid Canterbury Federated Farmers in Ashburton this week.

"We're all going to survive this. It's all going to be a joke in five years," he said.

A combination of misinterpreted and misguided science, media hype, and political spin had created the current hysteria and it was time to put a stop to it.

"It is time to attack the myth of global warming," he said.

Water vapour was responsible for 95 per cent of the greenhouse effect, an effect which was vital to keep the world warm, he explained.

"If we didn't have the greenhouse effect the planet would be at minus 18 deg C but because we do have the greenhouse effect it is plus 15 deg C, all the time."

The other greenhouse gases: carbon dioxide, methane, nitrogen dioxide, and various others including CFCs, contributed only five per cent of the effect, carbon dioxide being by far the greatest contributor at 3.6 per cent.

However, carbon dioxide as a result of man's activities was only 3.2 per cent of that, hence only 0.12 per cent of the greenhouse gases in total. Human-related methane, nitrogen dioxide and CFCs etc made similarly minuscule contributions to the effect: 0.066, 0.047 and 0.046 per cent respectively.

"That ought to be the end of the argument, there and then," he said.

"We couldn't do it (change the climate) even if we wanted to because water vapour dominates."

Yet the Greens continued to use phrases such as "The planet is groaning under the weight of CO2" and Government policies were about to hit industries such as farming, he warned.

"The Greens are really going to go after you because you put out 49 per cent of the countries emissions. Does anybody ask 49 per cent of what? Does anybody know how small that number is?

"It's become a witch-hunt; a Salem witch-hunt," he said.