A new study shows that poor air quality has reduced the amount of sunlight reaching China's solar installations, undermining the country's renewable energy efforts.
A report from the Union of Concerned Scientists finds that, across 12 states, non-white residents bear disproportionate pollution from cars and trucks.
After DNC chair Tom Perez promised the issue would "feature prominently" in the debates, climate activists were disappointed by how little attention it got.
The Democratic Party refused to host a single issue climate debate, but as 20 presidential candidates square off in Miami this week, the topic is expected to be discussed.