The ozone layer sits near the top of earth's atmosphere and protects us from the sun's harmful ultraviolet rays. but ozone is dangerous when it's closer to ground level. which of the following describes ozone?

The germs that cause infections are mainly spread in what three ways? a. immunization, mucous membranes, not washing hands b. germ-laden droplets, direct contact with body fluids, insects c. hand hygiene, sickness, immunization d. not enough sleep, low oral hygiene, germs

How does nitrogen oxides are produced and their air environment impact

If a person has a bad pain in their back, specifically lower back a bit above the hip, what should they do besides going to the doctor? what remedies could they use?