Laughing gas is the next environmental threat? Marc Morano:

As man-made climate fears subside and the scientific, economic, cultural and political case evaporates for climate change “action,” expect more and more green activists to take up the mantle for “laughing gas” as a possible replacement eco-scare.
See also: Laughing Gas Knocks Out CO2 – By Doug Hoffman – Oct. 30, 2009 – Excerpt: “In the face of ever mounting evidence that CO2 is incapable of causing the level of global devastation prophesied by climate change catastrophists a new villain is being sought. The leading candidate is nitrous oxide (N2O), better known as laughing gas. A report in Science claims that N2O emissions are currently the single most important cause of ozone depletion and are expected to remain so throughout the 21st century. The IPCC rates N2O as 310 times as potent a greenhouse gas as CO2 on a 100 year time scale. Is this a greenhouse gas bait and switch, or are the global warming alarmists trying to up the ante.”