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E'FIVE ARV <br />greenhouse gas emissions today. decision -makers put <br />;lace processes that increase ()Vera <br />and each year those decision -makers fail to act sery <br />broaden and deepen those risks, in some ways, climate <br />Change is .lice an interest -only loan we are pitting on the <br />backs of future generations: They will be stuck paying off <br />the emulative interest on the greenhouse gas emissions <br />we're putting into the atmosphere now, with no possibili- <br />ty of actually paying down that "emissions principal." <br />Our. key find':nos underscore t <br />oh our current ern€ssioni s path, our CIi <br />multiply and accumulate as the decades tick by, <br />risk: include: <br />s Large-scale losses of coastal property and <br />infrastructure <br />if we continue on our current path„ by 2050 between <br />$66 billion and $1105 billion worth of existing chaste. <br />property will likely be below sea level nationwide, <br />with $238 billion to $507 billion worth of property <br />below sea level by 2100. <br />» There is a 1-in-20 chances —about the saarrne chance <br />as ari American developing colon cancer; twice as <br />likely as an American developing melanoma' —that <br />by the end of this century, more than $701 billion <br />worth of existing coastal property will be below <br />mean sea levels; with more than $730 billion of <br />additional property at risk during high tide. By the <br />same measure cd or obability, average annual losses <br />ricanes and other coastal storms along the <br />oard and the Gulf of Mexico will grow <br />$42 billion due to sea level rise alone. <br />Potential ciang.es in hurricane activity could raise this <br />figure to $105 billion, <br />Property losses from sea level rise are corcentr»..ec <br />in specific regions of the U.S„ especially on the <br />Southeast and Atlantic coasts, where the rise is higher <br />and the losses far greater than the national average. <br />Extreme heat across the nation —especially in the <br />Southwest, Southeast, and Upper Midwest —threat- <br />ening labor productivity, human health, and energy <br />systems <br />ie <br />n <br />centur ,the atvr ra.e Arnencan <br />will likely see 27 to 50 days vt 95"F each year —two <br />to more than three times the average annual number <br />of 95"F days we've seen over the past 30 years. By: <br />the end of this Century, this number will likely reach <br />45 to 96 days over. 95"F each year on average. <br />•,$ with sea level rise ational averages 'nask <br />Southwest, regional extremes, especially i€; the So es <br />�; <br />Southeast, and upper Midwest, which will likely see <br />several tnonth.s of 9S F days each year. <br />Labor productivit\' o' outdoor workers; such as <br />those working in construction, utility maintenance, <br />landscaping, and agriculture, could be reduced by <br />as much as 3%, particularly in the Southeast. For <br />context, labor productivity across the entire U.S. <br />labor force declined about 1.5% during the famous <br />"productivity slowdown" in the 1970s.3 <br />» Over the longer teen, during portions of the year, <br />extreme heat couid surpass the threshold at which <br />the human body can no longer maintain a normai <br />core temperature without air conditioning, which we <br />measure ?.sing a ' Hurnicl Heat Stroke index" <br />i ur ng these periods anyone whose job requires <br />t€"€err tF word E tutdoors, as well as anyone lacking <br />RISKY BUSINESS <br />The Economic Risks of Climate Change In the United States <br />