The lesson plan provides a full menu for use from primary school to high school. Depending on the grade level and the unit of study that provides the context for a...
The increasing efficiency of tornado days in the United StatesLast Updated on 2014-08-22 15:44:20
The authors analyze the historical record of tornado reports in the United States and find evidence for changes in tornado climatology possibly related to global warming. They do this by examining the annual number of days with many tornadoes and the ratio of these days to days with at least one tornado and by examining the annual proportion of tornadoes occurring on days with many tornadoes. Additional evidence of a changing tornado climate is presented by considering tornadoes in geographic clusters and by analyzing the density of tornadoes within the clusters. There is a consistent decrease in the number of days with at least one tornado at the same time as an increase in the number of days with many tornadoes. These changes are interpreted as an increasing proportion of tornadoes occurring on days with many tornadoes. Coincident with these temporal changes are increases in... More »
Thanks To The Clean Air Act, We Breathe 3 Million Fewer Tons Of Toxins Each YearLast Updated on 2014-08-22 10:46:19Actions taken by the Environmental Protection Agency under the Clean Air Act have caused U.S. toxic air emissions to drop “significantly” — in some cases by more than half — since the law was amended in 1990, the regulatory agency told Congress in a report Thursday. Read here for more
http://www2.epa.gov/sites/production/files/2014-08/documents/082114-urban-air-toxics-report-congress.pdf READ HERE FOR THE FULL EPA REPORT
Hot and Getting Hotter: Heat Islands Cooking U.S. CitiesLast Updated on 2014-08-22 10:31:21Cities are almost always hotter than the surrounding rural area but global warming takes that heat and makes it worse. In the future, this combination of urbanization and climate change could raise urban temperatures to levels that threaten human health, strain energy resources, and compromise economic productivity. Read more here
Global warming slowdown 'could last another decade'Last Updated on 2014-08-22 10:09:01The hiatus in the rise in global temperatures could last for another 10 years, according to new research.
Scientists have struggled to explain the so-called pause that began in 1999, despite ever increasing levels of CO2 in the atmosphere. Read more here
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