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Tham khảo tài liệu 'climate management - solving the problem part 8', khoa học tự nhiên, địa lý phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 216 CLIMATE MANAGEMENT Future Changes in the Earth s Environment under the Effects of Continued Global Warming continued 2100 Atmospheric CO2 levels will be higher than they have been for the last 650 000 years IPCC . Ocean pH levels will very likely decrease by as much as 0.5 pH units the lowest it has been in the last 20 million years IPCC . Thawing permafrost will make Earth s land area a new source of carbon emissions it will emit more CO2 into the atmosphere than it absorbs IPCC . New climate zones will appear on up to 39 percent of Earth s land surface IPCC . One-fourth of all plant and land animal species could become extinct IPCC . WINNERS AND LOSERS In the United States the U.S. Global Change Research Program operates the U.S. National Assessment of the Potential Consequences of Climate Variability and Change National Assessment . It breaks the United States into regional geographic sections e.g. Pacific Northwest Southeast West Midwest Great Plains Alaska and so forth and generates reports for each region detailing climate impacts and practical methods of adaptation. The reports are backed by both scientists and policy makers in the hope that constructive progress will be made in scientific understanding and social action. The way the program works the National Assessment currently consists of16 ongoing regional projects. For each of the regional studies teams of scientists resource planners and other involved parties meet to assess the region s most critical vulnerabilities in areas such as agricultural productivity coastal areas water resources forests and human health. In addition to looking at potential impacts the teams also work together to identify possible strategies that can be used to adapt and respond to climate change. The overall goal of the project is to help those in the United States prepare for future climate change. The Future What Lies Ahead 217 According to Michael MacCracken who heads the national office The goal of the assessment is
