Two earth-like planets orbited the same star. The inhabitants of Earth I released greenhouse gases into the atmosphere. Earth II, however, was much more conscious about the environment and protected it from anthropogenic changes. Which planet caused the greenhouse effect?
Ans: Earth I

Two villages are inhabited by lots of people that ride bicycles. Hill village is located on a mountain and gets lots of rain, and Low village is situated in a valley, and has more sunny days. Which village has fewer cyclists going downhill?
Ans: Low

Two countries are situated on the shores of the same sea. Turkey is a nation of farmers, they use conventional agricultural methods to produce food, including lots of fertilizers. Greece's economy is mostly based on tourism. Which country causes the entry into the sea of fewer potentially hazardous particles?
Ans: Greece

The Madrigal Ocean and the Listy Ocean are two bodies of water currently under observation by scientists on a planet nearly identical to Earth. Although the studies have just started, the scientists have already discovered that the salinity of the Madrigal Ocean is much lower than that of the Listy Ocean. This isn't much information, but it's progress and the scientists are not going to stop their studies until they learn all that they can about these waters. Is the Listy Ocean probably connected to more or less rivers than the Madrigal Ocean?
Ans: less