UN agreement reached on aircraft climate-change emissions

WASHINGTON - The United Nations' aviation arm overwhelmingly ratified an agreement Thursday to control global warming emissions from international airline flights, the first international climate-change pact to set limits on a single industry.

The agreement, adopted overwhelmingly by the 191-nation International Civil Aviation Organization at a meeting in Montreal, sets airlines' carbon emissions in the year 2020 as the upper limit of what carriers are allowed to discharge. Airlines that exceed that limit in future years, as most are expected to do, will have to offset their emissions growth by buying carbon credits from other industries.

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