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Global concentrations of carbon dioxide, the major greenhouse gas blamed for climate change, reached in 2005 the highest levels ever recorded, the UN's weather agency said Friday.
The trend of growing emissions from industry, transport and power generation from burning fossil fuels such as oil, gas and coal is set to continue despite an international agreement to cap emissions, the World Meteorological Organisation (WMO) warned.
"To really make CO2 level off we will need more drastic measures than are in the (1997) Kyoto Protocol today," senior WMO scientist Geir Braathen told reporters. "Every human being on this globe should think about how much CO2 he or she emits and try to do something about that," he said.
The latest data gathered from monitoring stations, ships and aircraft around the world were contained in the WMO's second annual Greenhouse Gas Bulletin. Globally averaged mean ratios of carbon dioxide (CO2) in the atmosphere reached 379.1 parts per million (ppm), an increase of 0.5 percent over 2004
Concentrations of nitrous oxide (N2O), another key greenhouse gas, reached 319.2 ppm in 2005, an annual increase of 0.2 percent, the bulletin added. "In 2005, globally averaged concentrations of carbon dioxide in the atmosphere reached their highest levels ever recorded," the WMO said in a statement.
Braathen said the levels of the two greenhouse gases were increasing at steady rates, in line with a decades-long trend. "It looks like it would continue like this for the foreseeable future," he added. "The current Kyoto Protocol will not be sufficient to stabilise. It will maybe reduce the increase, but this will still take time," he added.
The treaty sets limits for emissions of six greenhouse gases emitted mainly by burning oil, gas and coal, including carbon dioxide, from 2008, for the 165 countries that have ratified it. The United States and Australia have rejected the compulsory cap, while developing countries, including China and its booming economy, are not covered by Kyoto.
A report for the British government released this week warned that unchecked climate change would cause huge economic damage world-wide, estimated at between five and 20 percent of global gross domestic product every year. The governments involved in the Kyoto Protocol are due to meet in Nairobi from Monday to examine their future path in combating global warming.
The environmental group WWF this week urged them to produce a "clear" plan for a "Kyoto plus" treaty on even deeper cuts in carbon dioxide emissions after 2012. Braathen said Friday: "Every initiative to bring down greenhouse gases is a welcome one and will help maybe to convince others that change is necessary."
He insisted that the data on greenhouse gases, which scientists only began to gather and analyse systematically at a global level two years ago, was the product of consensus among scientists. "We believe that this data has a really good scientific foundation," he said.

Copyright Agence France-Presse, 2006

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