Oklahoma Gov. Mary Fallin and husband Wade Christensen will host the 17th annual Septemberfest on Sept. 7 at the Governor's Mansion and Oklahoma History Center.
Septemberfest is a free family event that features a variety of attractions.This year's celebration will include historic re-enactments, a chalk artist, pony rides, crafts, inflatables, carriage rides and steer roping. Also featured will be an outdoor music stage, American Indian dancers, chuck wagon cooking and a rock-climbing wall.
President Obama is set to hold a news conference at the White House on Friday at 3 p.m. ET — his first such formal give-and-take with the press corps since "NSA leaker" Edward Snowden starting spilling secrets about National Security Agency surveillance programs in June.
So we should expect questions about Snowden, spying and civil liberties, as well as strained relations with Russia, the economy and other subjects.
Plants accumulate carbon in the spring and summer, and they release it back into the atmosphere in the fall in winter. And a change in the landscape of the Arctic tundra, seen here, means that shrubs hold onto snow better, which keeps the organic-rich soils warmer and more likely to release carbon dioxide that's stored there.
Credit Jean-Erick Pasquier / Gamma-Rapho via Getty Images
This chart shows the levels of atmospheric carbon dioxide as measured from Point Barrow, Alaska, from 1974 to 2007. Not only has the general trend ticked upward, but the size of the seasonal swings (the "saw tooth" pattern) has increased year to year.
Plant life on our planet soaks up a fair amount of the carbon dioxide that pours out of our tailpipes and smokestacks. Plants take it up during the summer and return some of it to the air in the winter. And a new study shows that those "breaths" have gotten deeper over the past 50 years.
This isn't just a curiosity. Plant life is helping to reduce the speed at which carbon dioxide is building up in our atmosphere. That's slowing the global warming, at least marginally, so scientists are eager to understand how this process works. The new study provides some clues.