Carbon dioxide (CO2) is the principal man-made greenhouse gas and the primary atmospheric component of the global carbon cycle. Precise ground-based measurements of CO2 made since the late 1950s indicate that the atmospheric CO2 concentration has increased from ~310 to over 380 parts per million (ppm) over this period .
A new study, co-funded by NASA, has identified a link between a warming Indian Ocean and less rainfall in eastern and southern Africa. Computer models and observations show a decline in rainfall, with implications for the region
With the average price of a gallon of gasoline hovering somewhere around $4 in the U.S. and oil prices continuing to rise the whole world is refocusing their attention on the viability of alternative energy sources. A window seems to be opening for genuine progress in lessening our dependence on fossil fuels.