United's 'Planet' Flight Takes a Step Toward Garbage-Free Skies

摘要

Back in 1972, the United Nations established June 5 as World Environment Day in an effort to raise awareness of the various harmful ways humans affect the planet. This year, air pollution is the theme. Airlines account for about 2% of annual global carbon emissions. This month, a few of them are showing how theyre trying to shrink their footprint.