None of the photos we've selected are pretty ... University said 41 people living in Delaware still die because of air pollution every year, The News Journal reported. In Denver, murky light ...

India's air quality lags behind WHO standards, with 41% of households using biomass fuels, leading to health issues. WHO's Dr ...

The rate at which the planet is warming has sped up since 2010, and now researchers say that China's efforts to clean up air ...