In this Friday, Nov. 10, 2017 file photo, motorists ride through a thick blanket of smog and dust on the outskirts of New Delhi, India., with microscopic particles spiking at times to 75 times the level considered safe by the World Health Organization. According to a scientific report from the United Nations released on Wednesday, March 13, 2019, climate change, a global major extinction of animals and plants, a human population soaring toward 10 billion, degraded land, polluted air, and plastics, pesticides and hormone-changing chemicals in the water are making the planet an increasing unhealthy place for people.