Climate Change is Creating More Space Junk

http://ecogeek.org/component/content/article/3206

Scientists at the University of Southampton have studied the orbits of 30 satellites over the past 40 years and discovered that they're taking longer to drop out of orbit and burn up.  The scientists think that increased CO2 in the upper atmosphere is causing it to cool and become less dense, slowing the braking effect and allowing satellites and spent rockets to circle for longer.