Earth
A mix-up means US air pollution is way worse than thought
Levels of nitrogen oxides in the air are still falling across the US, but satellite measurements show the reduction has slowed down unexpectedly since 2011
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Levels of nitrogen oxides in the air are still falling across the US, but satellite measurements show the reduction has slowed down unexpectedly since 2011
One-eighth of the world’s 11,000 bird species are now threatened, and in most cases farming is the biggest threat thanks to our increasingly meat-rich diets