Problem: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.  Which researcher found more evidence of land clearing?

A: Bob


Problem: Two teams of runners took part in a study about exercise. Red team ran 10 km in the heat, while Green team ran the same distance in the morning in cool weather. The Red team experienced more runners with health problems.  Which team had fewer runners with muscle weakness?

A: Green


Problem: Due to an increase in the number of factories releasing carbon dioxide the concentration of it has increased. Recent reports show a correlation between increasing levels of carbon dioxide and the average global temperature increasing.  Will releasing more carbon dioxide cause the average temperature to increase or decrease?

A: increase


Problem: Jimmy is currently shopping at his local grocery store during his weekly trip to get food and other necessities. He first picks up some frozen pizzas, his favorite meal when he is feeling lazy after work, and then stops off to pick up a loaf of bread. He then walks over to the dairy section to pick up some cheese for his lunches. Jimmy never buys milk, but today he has a sudden urge to get some. He walks over to the milk refrigerators and looks at all the options. He is currently debating between two brands, Luchene and Jean's. While trying to decide, he notices a sticker on the Luchene gallon that says "organic," but is unable to find any such indication on the gallon of Jean's milk. After asking an employee, it is confirmed that Jean's is not organic milk. Unable to make up his mind, Jimmy simply leaves without buying any milk.  Which brand requires more cows to produce the same amount of milk?

A:
Luchene