Planet Y and planet X were two inhabited planets in a nearby solar system. People from Planet X were living in harmony with nature, and didn't hurt the environment in any way. People on planet Y generated lots of air pollution, and destroyed their ozone layer by using inappropriate substances. Given the paragraph above, please answer correctly the following question: Which planet didn't alter their nitrogen cycle?
Ans: planet X

Andrew just moved into his new apartment but realized he made a mistake. He loaded a box too heavy for him to lift. He decides to try to push the mox into his house from the back of his building which has a very rough path and struggles to get the box in the house. Given the paragraph above, please answer correctly the following question: Will reducing friction increase of decrease the effort needed to push an object?
Ans: decrease

Rob was evaluating two research studies on climate change, study A and study B. Study A explained how increased greenhouse gases would affect the climate. On the other hand, study B showed how decreased greenhouse gases would affect the climate. Rob found the studies very interesting. Given the paragraph above, please answer correctly the following question: Would less or more heat be trapped inside the Earth's atmospher in study B than in study A?
Ans: less

Woodland had two nearby fish hatcheries. Pine hatchery had great result the past few years because they found a way to reduce ammonia water toxicity. Spruce hatchery has big ammonia toxicity problems and hadn't find a way to remediate them. Given the paragraph above, please answer correctly the following question: Which hatchery found fewer fish with reduced fecundity?
Ans: Pine