Q: Brad and Henry were two old friends in their 70's. Brad had very high levels of cholesterol, while Henry was healthier and had normal levels of cholesterol. Which friend takes a drug that decreases blood levels of cholesterol?
A: Brad

Q: Hill town was full of gasoline powered vehicles, while Valley town 50 miles away, banned all gas powered vehicles and allows only electrical vehicles or horse-and-buggies. Which town emitted more nitrogen oxides?
A: Hill

Q: John is studying a species in two similar countries, country A and country B. Country A has large population, but country B has small population of that species. John is pondering about how this species would fare in the future in these two countries. In which country individuals of the species would have more food, country A or country B?
A: country B

Q: Manny visited 2 countries. First he visited Australia, a country which respected the environment and produced zero air pollution, and New Zealand, a country which based its economy on burning fossil fuels and generated a lot of air pollution. Which country had fewer children affected by air pollution?
A:
Australia