During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well.
Tornadoes Slam the Mid-West February 29, 2012
At least 10 tornadoes were reported overnight in the mid-west of the United States, hitting towns in the states of Kansas, Missouri, Illinois, and Kentucky. Storms are moving east, and the tornado threat continues. For more information, visit the Weather Channel.
