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 to make paper?
Ans: Willow

John has been hearing about climate change for last couple of years. He wants to understand the science behind climate change. For that, he picked up two eras in earth's history, era A and era B. Era A was hundred thousand years ago, and era B is in the present day. He now wants to compare these to eras to understand the change in climate better. Which era would have less carbon dioxide in the atmosphere, era A or era B?
Ans: era A

Canada produced its electricity by using fossil fuels and nuclear fission. New Zealand used only alternative, renewable sources to produce their electricity. Which country causes more air pollution?
Ans: Canada

John is an amateur astronomer. Last week he was observing the sky with his telescope. First he pointed his telescope at planet Mars. He noted it as case A. Then he pointed his telescope to planet Jupiter, which is farther form the Sun than Mars is. He noted it as case C. Finally, he pointed the telescope to a faraway planet called WASP-17b. He noted that as case B. Which case would have longer year, case A or case C?
Ans: case C