Science: In the quest to head off rising global temperatures, some scientists have argued for steep curbs in how much soot and methane are released into the air. But a new study suggests that targeting such emissions in the next couple of decades may make much less of a dent than previously thought.
While carbon dioxide emissions get much of the press when it comes to global climate change, methane and soot are also big culprits. Methane, when assessed over the course of a century, warms the planet about...