Most of the Earth's gases are made of nitrogenAlgae produces most of Earth's oxygen, approximately 50%Carbon dioxide piled up into giant black clouds is smog. It causes a lot of health problems for people in areas of California.
Environmental Facts
Oxygen caused the first ever major extinctionDuring the Cambrian Period, CO2 levels were 16 times more than nowThe color of the sky would be purple if the human eye was less sensitive to blue.The atmosphere is 6,200 miles high
Environmental Facts
Oxygen was about 1.54 times more in the Devonian PeriodEven though it gets colder when you go higher, the warmest area in Earth is 62 miles highThere is almost 40 trillion gallons of water in the sky