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While nations concede a pressing need for attacking carbon dioxide emissions, other pollutants offer quicker paybacks

Nations are attacking pollutants other than carbon dioxide emissions for quicker paybacks.

Li Ming Lz/AP Images

By Erin Wayman

- More than 2 years ago

T wo degrees Celsius: the point of no return. Once average global temperatures exceed preindustrial levels by this amount, scientists warn, a climate catastrophe could become inevitable.