Problem: Two neighboring towns, Pine town and Willow town, used different types of woods for lumber et al. Willow town used hardwoods, while Pine town used softwoods. Which town used fewer conifers for lumber?

A: Willow

Problem: Nicholas works in pest control, and needs to have a steady supply of nitrogen gas for his tools. He always keeps a closed container of nitrogen gas in his freezer, where the temperature is very low. Nicholas's neighbor, Justin, likes to grill in his backyard. Justin, therefore, always keeps a closed container of propane gas outside, where the temperature is high. Molecules of which gas will have lower kinetic energy?

A: nitrogen gas

Problem: Two high school buddies, Dan and Bob, had very different lifestyles 30 years later. Dan made only healthy lifestyle choices, was vegan. Bob ate meat, cheese and didn't care about his health and didn't protect himself. Which man was exposed to a lower risk of cancer, Dan or Bob?

A: Dan

Problem: Two dairy farms were supplying milk and other milk products to the surrounding counties. Sunny farm practiced organic farming and produced organic milk, while Cloud farm was into conventional milk production. Which farm leached more nitrates into the water?

A:
Cloud