Here are the top environmental stories folks are Digging
— Ancient methane that's been trapped beneath a "lid" of ocean-floor permafrost is now bubbling to the surface, and Russian scientists say global warming may be the culprit.
— The Big Apple's Office for Visual Interaction is testing light-emitting diodes that could one day replace all 300,000 of the city's street lamps.
— The CS Monitor highlights environmentalists' varying reactions to Ken Salazar and Tom Vilsack, who are generally embraced but have some unchecked baggage.
— Inventing Green's Alexis Madrigal examines Britain's WWI-era practice of cultivating lettuce under individual bell-shaped glass "jars."
— Arginine, which improves sperm production and genital blood circulation in human males, apparently also helps trees grow stronger root systems and draw nitrogen more efficiently.