Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Did you know?
The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
Did you know?
Thyroid conditions may make getting pregnant impossible.
Did you know?
No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
“Windows” Through the Atmosphere
Primary aging means changes in hair color and skin texture for almost everyone.
The Structure of the Atmosphere
The Atmosphere Screens Earth from Harmful Solar Radiation