Problem: 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. Which person's plan is likely to destroy less forests?

A: Stacy

Problem: Michael recently moved to Xin Jiang, where there is a large amount of air pollutants due to the chemical manufacturing industry there. Kevin, on the other hand, recently moved to Toronto which just finished a several month long tree planting initiative that has drastically lowered the amount of air pollutants in the city. Who is less at risk for having a heart attack?

A: Kevin

Problem: Two friends went to the doctor because they weren't feeling well. As it turns out Danny had a condition called hypercalcaemia, while Greg had hypocalcaemia. Which friend didn't have an inadequate secretion of parathyroid hormone?

A: Danny

Problem: After working out in the yard for the day doing various chores, Karen comes back inside to prepare for a shower. While waiting for the shower to heat up, she notices she got one cut on each of her arms. The cut on her left arm is hardly even noticeable, but the one on her right arm is red and easy to see. Karen gets some cream from her cabinet to use on her cuts after she gets done showering. Will the cut on Karen's right arm be warmer or cooler than the cut on her left arm?

A:
warmer