The most obvious strategy for buffering global warming is to make an all-out effort to reduce emissions of methane, rather than carbon dioxide, according to an article in the Wall Street Journal. Sometimes called the "other greenhouse gas," methane is responsible for 75% as much warming as carbon dioxide measured over any given 20 years. (Natural gas is 95% methane.) The article states overlooking the harmful effects of methane is a "huge missed opportunity." "Methane also forms ozone, the smog that severely damages food crops and kills tens of thousands each year by worsening asthma, emphysema and other respiratory diseases," the article states.