3. The climate change that we have caused has affected the lifestyle
of the people in every part of the world. Not only the people but
the wildlife as well is trying to adjust to these changes. What
lessons can we learn from this and what can we do to stop the
drastic climatic changes that we have been facing?
Answers
Answer:Over the past several decades, the international and national research communities have developed a progressively clearer picture of how and why Earth’s climate is changing and of the impacts of climate change on a wide range of human and environmental systems. Research has also evaluated actions that could be taken—and in some cases are already being taken—to limit the magnitude of future climate change and adapt to its impacts. In the United States, a series of reports by the U.S. Global Change Research Program (USGCRP, also known as the Climate Change Science Program from 2001 to 2008) have synthesized the information specific to the nation, culminating in the report Global Climate Change Impacts in the United States (USGCRP, 2009a). Internationally, scientific information about climate change is periodically assessed by the Intergovernmental Panel on Climate Change (IPCC), most recently in 2007. Much has been learned, and this knowledge base is continuously being updated and expanded with new research results.
Explanation:This conclusion is based on a substantial array of scientific evidence, including recent work, and is consistent with the conclusions of the IPCC’s Fourth Assessment Report (IPCC, 2007a-d), recent assessments by the USGCRP (e.g., USGRP, 2009a), and other recent assessments of the state of scientific knowledge on climate change. Both our assessment and these previous assessments place high or very high confidence1 in the following findings:
As discussed in Appendix D, high confidence indicates an estimated 8 out of 10 or better chance of a statement being correct, while very high confidence (or a statement than an ourcome is “very likely”) indicates a 9 out of 10 or better chance.
The following sections elaborate on these statements and provide a concise, high-level overview of the current state of scientific knowledge about climate change in 12 critical areas of interest to a broad range of stakeholders:
Changes in the climate system;
Sea level rise and risk in the coastal environment;
Freshwater resources;
Ecosystems, ecosystem services, and biodiversity;
Agriculture, fisheries, and food production;
Public health;
Cities and the built environment;
Transportation systems;
Energy systems;
Solar radiation management;
National and human security; and
Designing, implementing, and evaluating climate policies.