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By National Research Council, Division on Earth and Life Studies, Board on Atmospheric Sciences and Climate, Committee on America's Climate Choices

ISBN-10: 0309145856

ISBN-13: 9780309145855

Weather swap is happening. it's very most probably as a result of the emission of greenhouse gases from human actions, and poses major dangers for a number human and usual structures. And those emissions proceed to extend, for you to lead to extra switch and larger hazards. America's weather offerings makes the case that the environmental, fiscal, and humanitarian hazards posed via weather switch point out a urgent want for tremendous motion now to restrict the value of weather switch and to organize for adapting to its affects. even if there's a few uncertainty approximately destiny probability, appearing now will decrease the hazards posed by means of weather switch and the strain to make better, extra swift, and very likely costlier rate reductions later. such a lot activities taken to lessen vulnerability to weather swap affects are good judgment investments that might provide defense opposed to ordinary weather adaptations and severe occasions. additionally, an important funding judgements made now approximately apparatus and infrastructure can "lock in" commitments to greenhouse gasoline emissions for many years to come back. eventually, whereas it can be attainable to reduce or opposite many responses to weather swap, it's tricky or very unlikely to "undo" weather swap, as soon as manifested. present efforts of neighborhood, country, and private-sector actors are very important, yet probably not to yield development resembling what should be accomplished with the addition of sturdy federal regulations that determine coherent nationwide ambitions and incentives, and that advertise powerful U.S. engagement in international-level reaction efforts. The inherent complexities and uncertainties of weather swap are top met through utilizing an iterative probability administration framework and making efforts to noticeably decrease greenhouse gasoline emissions; organize for adapting to affects; put money into clinical examine, expertise improvement, and knowledge platforms; and facilitate engagement among medical and technical specialists and the various varieties of stakeholders making America's weather offerings.

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Extra resources for America's Climate Choices

Sample text

Marquis, K. B. Tignor, and H. L. : National Academies Press, 2010); and H. D. Matthews, N. P. Gillett, P. A. Scott, and K. Zickfeld, “The proportionality of global warming to cumulate carbon emissions” (Nature 459[7248]:829-U823, 2009). Note that in Stabilization Targets, numbers are given in tons of carbon, whereas here they are converted to tons of CO2. c S. J. Davis, K. Calderia, and D. 1188566). Waiting for unacceptable impacts to occur before taking action is imprudent because many of the impacts of GHGs emitted today will not fully manifest themselves for decades; and once they do appear, they can be with us for hundreds or even thousands of years.

Yet as discussed in Chapter 3, the many complexities inherent to climate change make it difficult to define the specific actions that are needed in an effective long-term response strategy. This chapter introduces iterative risk management as an approach that lets decision makers begin to address climate change now, in a systematic way, while allowing response strategies to be adjusted and improved as new information and knowledge are gained. 1); however, the details of how it is actually applied in various real-world situations depend strongly on the context of that situation, including the specific problem being addressed, the stakeholders involved, the values and priorities of those stakeholders, and the decision-support tools and resources available.

Future emissions (and future vulnerability to climate change) will be determined by a complex set of developments taking place around the world—related to population, economic growth, energy, land use, technology and innovation, and other factors. It is not possible to predict how all such factors will change in the coming decades, but scenarios allow us to explore the implications of different pathways. ” Even if future emissions were known exactly—that is, if a given emission scenario held true exactly—the magnitude of future climate change and the severity of its impacts cannot be predicted with ­absolute certainty, due to incomplete knowledge of how the climate system will respond.

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America's Climate Choices by National Research Council, Division on Earth and Life Studies, Board on Atmospheric Sciences and Climate, Committee on America's Climate Choices

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