New Scientist: Our new-found love for flat-screen TVs could come back to haunt us. Earlier this year, researchers warned that the growing popularity of this technology was releasing increasing amounts of a powerful greenhouse gas into the atmosphere. Now, researchers say levels of the gas are four times as high as previously estimated, and warn they are rising “quasi-exponentially”. Nitrogen trifluoride (NF3) is 17,000 times more effective at warming the atmosphere than an equal mass of …