Just days after the Paris Agreement crossed the second threshold needed for it to enter into effect, the International Civil Aviation Organization (ICAO)— with the support of 191 countries—approved a plan to offset emissions from international aviation. The agreement targets passenger and cargo flights that produce over 1,000 metric tons of greenhouse gases annually, or about 2% of global carbon emissions, and seeks to make growth in the industry carbon-neutral after 2020. The agreement will not become mandatory until 2027, although most small, developing countries will be exempt from compliance. However, 65 countries, representing 80% of the industry’s emissions and including the world’s biggest aviation emitters—United States, China, and European Union—are agreeing to participate immediately. Though the agreement is supported by several environmental groups, environmental advocates have expressed concern about enforcing the quality of offsets. For the full story, see https://www.theguardian.com/environment/2016/oct/06/aviation-emissions-agreement-united-nations and http://www.eenews.net/eenewspm/2016/10/06/stories/1060043977.