By Fidel Castro Ruz
December 26, 2009 -- Climate change is already causing enormous damage and hundreds of millions of poor people are enduring the consequences.
The most advanced research centres have claimed that there is little time to avoid an irreversible catastrophe. James Hansen, from the NASA Goddard Institute, has said that a proportion of 350 parts per million of carbon dioxide in the atmosphere is still tolerable; however, the figure today is 390 ppm and growing at a pace of 2 ppm every year. Each one of the past two decades has been the warmest since the first records were taken, while carbon dioxide increased 80 ppm in the past 150 years.
The melting of ice in the Artic Sea and of the huge two-kilometre thick ice cap covering Greenland, of the South American glaciers feeding its main fresh water sources and the enormous volume of ice covering Antarctica; of the remaining ice on Mt Kilimanjaro and the Himalayas, and the large frozen area of Siberia are visible. Outstanding scientists fear abrupt quantitative changes in these natural phenomena that bring about the change.