Seasons, because the earths axis is tilted we have seasons. without the tilt we would never have seasons.
Because laissez-faire means freedom and the government gave business to sell the goods at the prices that they would like.
Help break down dead plants and organisms. Release carbon dioxide through respiration. Nitrogen being returned to the soil as ammonia.
But it was not until 1928 that penicillin, the first true antibiotic, was discovered by Alexander Fleming, Professor of Bacteriology at St. Mary's Hospital in London.
Sediment pollution is the single most common source of pollution in U.S. waters. Approximately 30% is caused by natural erosion, and the remaining 70% is caused by human activity. ... Sediment pollution can have long-term impacts on aquatic insects, fish and other wildlife in affected waterways
