DDT was one of the first chemicals in widespread use as a pesticide. Following World War II, it was promoted as a wonder-chemical, the simple solution to pest problems large and small. Today, nearly 40 years after DDT was banned in the U.S., we continue to live with its long-lasting effects:
Answer:
Runoff from dairy farms causes high E. coli counts
Explanation:
Based on the scenario being described within the question it can be said that one hypothesis for this would be that the runoff from dairy farms causes high E. coli counts. This is because this runoff caries vasts amounts of organisms across the land and brings various animals which drink from the excess water and spread and increase the e.coli count.
Answer:
gallstones
Explanation:
Gallstones are hardened deposits of digestive fluid that forms in the gallbladder that is found under the liver. The formation of these gallstones can be as a result of the inability of the bile to secret enough chemical to dissolve excess cholesterol t is excreted by the liver. It can also be caused s a result of the malfunction of the gallbladder.
When symptoms of gallbladder show, they often present signs such as pain in the right upper abdomen, nausea, vomiting etc.
Risk factors of gallstones include: eating high cholesterol diet, sedentary lifestyle, obesity etc.
A runaway greenhouse effect is a process in which a net positive feedback between surface temperature and atmospheric opacity increases the strength of the greenhouse effect on a planet until its oceans boil away. An example of this is believed to have happened in the early history of Venus.
Answer:
Quarks pair with other quarks to form protons and neutrons.
Explanation:
Every atom contains a nucleus and within the nucleus, protons and neutrons are present. A quark is the fundamental particle of a matter. Quarks are joined together to form hadrons. Protons and neutrons in the nucleus of an atom are hadrons. Thus, quarks are the smallest particle of a matter as believed by most of the physicists.
