Ken and Stacy are two engineers discussing their plans about what source of energy they should use to generate electricity in a new city they are helping design. Ken feels that they should use coal since it's reliable, abundant and relatively cheap. Stacy argues that they should use solar power because there is an infinite supply of solar energy. Will Stacy's plan increase the temperature of the oceans more or less than Ken's
Ans: less

Park farm and Fiddle farm provided Red city with tonnes of produce annually. Fiddle farm used and abundance of fertilizers and pesticides, while Park farm didn't use any of those substances. Which farm caused less fertilizer to dissolve in the soil because of rain?
Ans: Park

Walter and Jesse, two coworkers, are sitting at a hotel bar having a drink together after a long day at a conference when they start discussing their smoking habits. Walter shares that he has regularly smoked a pack of cigarettes for the past ten years. Jesse says he only smoked a couple cigarettes during college while he was drinking and isn't a regular smoker. Which man is more likely to have lung cancer?
Ans: Walter

Two college buddies have known each other for 20 years. Tim was HIV positive while John was not and he didn't have a problem with it. Both friends are 40 years old. Which friend cannot expect to reach an average human life span?
Ans: Tim