Natural World News: The new NASA global data set combines historical measurements with data from climate simulations using the best available computer models to provide forecasts of how global temperature (shown here) and precipitation might change up to 2100 under different greenhouse gas emissions scenarios. June 9, 2015.
Human-caused climate change is real, some of the leading scientific groups in the United States remind lawmakers.
In a letter dated June 28, 31 major scientific organizations make it clear...