Carbon dioxide pollution levels in Earth's atmosphere hit a record high in 2012, according a UN report released Wednesday. The concentration of carbon dioxide, a primary contributor to global warming, is far beyond the level some scientists and environmental groups say is the upper limit for a safe level.
False widow spiders, often confused with black widow spiders, have forced the closure of a school in Britain a week before Halloween. No one has been bitten by the false widow spiders, according to the school, but local health authorities have advised it to close for the day to deal with the infestation.
Renewable energy law in Minnesota requires utilities to get 1.5 percent of their power from solar. By Monday, Xcel Energy has to show how it would manage rollout of neighborhood solar gardens. Rather than an expensive home retrofit for renewable energy, solar gardens allow residents to buy shares of solar power.