Question: Given the background: Air pollution can also indirectly cause other health issues and even deaths. Air pollutants can cause an increase in cancer including lung cancer, eye problems, and other conditions. For example, using certain chemicals on farms, such as the insecticide DDT (dichlorodiphenyltrichloroethane) and toxic PCBs (polychlorinated biphenyl), can cause cancer. Indoors, pollutants such as radon or asbestos can also increase your cancer risk. Lastly, air pollution can lead to heart disease, including heart attack and stroke.  and the situation: The health inspectors reviewed data from two villages, Key and Auburn. Key village presented higher levels of both indoor and outdoor pollution.  Answer the following question: Which village had a higher number of health issues?
Answer: Key

Question: Given the background: Mantle melting can come about three ways: (1) when the temperature rises, (2) if the pressure lowers (which lowers the melting point), and (3) if water is added, which lowers the melting point. Two of these (1 and 3) might explain why there are volcanoes at convergent plate boundaries: the temperature of the subducting plate increases as it sinks into the hot mantle (1). Sediments lying on top of the subducting plate contain water. As the sediments subduct, the water rises into the overlying mantle material. This lowers the melting temperature of the mantle (3). When the mantle above the subducting plate melts, volcanoes form above it. This leads to volcanoes in an island arc or continental arc.  and the situation: Ben and Mike both studied earthquakes, while Mike was more interested specifically in mantle melting and related phenomena.  Answer the following question: Which person learned about lowering the melting temperature of the mantle?
Answer: Mike

Question: Given the background: Compared to conventional milk production, organic milk production tends to have lower eutrophication potential per ton of milk or per hectare of farmland, because it potentially reduces leaching of nitrates (NO3−) and phosphates (PO4−) due to lower fertilizer application rates. Because organic milk production reduces pesticides utilization, it increases land use per ton of milk due to decreased crop yields per hectare. Mainly due to the lower level of concentrates given to cows in organic herds, organic dairy farms generally produce less milk per cow than conventional dairy farms. Because of the increased use of roughage and the, on-average, lower milk production level per cow, some research has connected organic milk production with increases in the emission of methane.Animal welfare issues vary among dairy farms and are not necessarily related to the way of producing milk (organically or conventionally).  and the situation: Jimmy is currently shopping at his local grocery store during his weekly trip to get food and other necessities. He first picks up some frozen pizzas, his favorite meal when he is feeling lazy after work, and then stops off to pick up a loaf of bread. He then walks over to the dairy section to pick up some cheese for his lunches. Jimmy never buys milk, but today he has a sudden urge to get some. He walks over to the milk refrigerators and looks at all the options. He is currently debating between two brands, Luchene and Jean's. While trying to decide, he notices a sticker on the Luchene gallon that says "organic," but is unable to find any such indication on the gallon of Jean's milk. After asking an employee, it is confirmed that Jean's is not organic milk. Unable to make up his mind, Jimmy simply leaves without buying any milk.  Answer the following question: Which brand of milk has lower eutrophication potential per hectare of farmland?
Answer:
Luchene