@CNN: More than 95% of the world’s population is breathing unhealthy air — and the poorest nations are the hardest hit https://t.co/3dnyhcMz7h
More than 95% of the world's population is breathing unhealthy air — and the poorest nations are the hardest hit https://t.co/3dnyhcMz7h
— CNN (@CNN) April 18, 2018