Latest report on global warming by UN says it will disrupt supply of food and water, and also slow down the world economic growth. Report indicates the rise in temperature may cause irreversible damage to nature and this will put pressure on governments to act.
The Intergovernmental Panel on Climate Change (IPCC) has prepared a 29 page draft that states the global warming risks such as food and water shortages and extinctions of plants and animals.
The draft report will be presented in Japan to Scientists and more than 100 Governments for further edition and approval. This report will be saved for the UN-summit on ways to curb rising greenhouse gas emissions to be held in Paris in 2015.
The report says crop yields may fall by up to two per cent a decade and some natural systems may also face risks of abrupt or drastic changes that could mean irreversible shifts, such as a runaway melt of Greenland or a drying of the Amazon rain-forest.
Changes in climate will grow high. Warming of 2.5 degrees Celsius above pre-industrial levels could mean massive changes in the world economy estimating global aggregate economic losses between 0.2 and 2.0 per cent of income. Temperatures have already risen by about 0.8 C.
Chair of the IPCC, Rajendra Pachauri, said that the scientific reasons given for reducing emissions and adapting to climate change are becoming far more compelling.
The report suggests options such as improved planning for disasters like hurricanes or flooding, efforts to breed drought- or flood-resistant crops and measures to save water and energy.
But many people are unconvinced. According to a Pew Research Center survey of 39 nations in 2013, only 40 per cent of Americans and 39 per cent of Chinese view climate change as a major threat.
About 200 governments have agreed to make efforts to stop warming to less than 2 C above pre-industrial limits. Main focus will be on curbing emissions from burning fossil fuels.
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