Educação pode mudar sua vida

The latest United Nations assessment of the role of humans in global warming has found with “high confidence” that greenhouse gas emissions are at least partly responsible for a host of changes already under way¹, including longer growing seasons and shrinking glaciers. 

A summary of the working draft of the report was provided to The New York Times yesterday by several people involved in reviewing it. It is a detailed follow-up to a February report by the United Nations group, the Intergovernmental Panel on Climate Change,  which was the fourth assessment since 1990 of the basic science that points to a human hand on the planet’s thermostat. The new report describes the specific effects of climate changes on people and ecology, identifies those species and regions at greatest risk and describes options for limiting risks. Some of the changes could be beneficial, but most will prove  harmful in the long run, the report says. 
It finds that global warming caused by humans  has most certainly contributed to recent shifts  in ecosystems, weather patterns, oceans and icy  regions, and that it will have large and lasting effects  on human affairs and on the planet’s web of life in  this century. It predicts a variety of health effects as well,  with “increased deaths, disease and injury due to  heat waves, floods, storms, fires and droughts²”, but  also “some benefits to health such as fewer deaths  from cold”. 
Also in the plus column, higher concentrations of  carbon dioxide, the main heat-trapping gas, are contributing to a greener world, according to the draft³. Based on satellite observations since the early 1980's, there is high confidence that there has been a trend in many regions towards earlier greening of vegetation in the spring and increased net primary production linked to longer growing seasons and increasing atmospheric CO₂ concentrations. But warming in cool regions can bring mixed results, the draft says.