Paul Ehrlich argued that overpopulation was responsible for environmental problems.
arrowRight
The first national Earth Day marked the largest demonstration in American history.
arrowRight
President Eisenhower asked the Public Health Service to study ways to control air pollution.
arrowRight
The Santa Barbara oil spill led to reforms in the energy industry.

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

When ash and dust begin to settle on the ground, they eventually become compacted by

Which of the following is not a benefit of genetically modified foods? a.pest-resistant crops b.herbicide-resistant crops c.plants that do not require water?