Geneva (Reuters) – the greenhouse gases that are causing climate change reached record levels in the atmosphere, despite the environmental campaigns global on the need to rely on clean energy sources said on Monday the weather of the UN agency
In its annual bulletin on greenhouse, the World Meteorological Organization (WMO) stated that the carbon dioxide, methane and nitric oxide now were more prevalent in the atmosphere than at any other time since the revolution industrial.
Warming caused by greenhouse gases – the net amount of radiation that enters the atmosphere – rose 29 per cent since 1990 and a 1.4 percent between 2009 and 2010, the latest year for which data are available, said the WMO.
Last week, UN scientists pointed out that this century will register waves of heat, drought, floods and storms more intense due to warming overall.
The report of the WMO measures the total amount of greenhouse gases in the atmosphere based on stations of vigilant in over 50 countries. This means that it includes natural emissions and the absorption processes, as well as emissions caused by human activity.
Carbon dioxide, responsible for 80 percent of the effect of global warming over the past two decades, grew rapidly with the use of fossil fuels.
But nearly half of the carbon dioxide caused by the use of fossil fuels since 1958 has been eliminated by the oceans and plants on Earth, said the report.
The second in importance, methane, greenhouse gas has grown over the past five years after leveling off between 2000 and 2006, for reasons that are not yet fully understood.
The third is nitric oxide, which can capture up to 300 times more heat than carbon dioxide. Its major human source is the use of nitrogen based fertilisers, which according to the report “deeply affected the global nitrogen cycle”.
The impact of the use of fertilizers is so marked is detected again in the northern hemisphere, nitric oxide are used where more fertilizer than in the South.
The report by scientists from the UN last week urged the Nations to create management plans disaster threatened by warming overall.
However, the WMO data showed that the growth of greenhouse gases not relented and the authors of the report stated that he needs more work to help understand what policies would have a greater effect.
Until now, the discernible impact clear a measure was a reduction of chlorofluorocarbons, or CFCS, which were banned because they caused a reduction in the layer of ozone.
But HFCs, chemicals that replaced the CFCs are also potent greenhouse gases and their abundance in the atmosphere, although small, now is growing rapidly.
