Problem: Two competing countries used different energy sources to produce their electricity. Turkey used mostly fossil fuels, while Greece used nuclear power. Which country used more radioactive elements?

A: Greece

Problem: Two researches studied adolescents during puberty. Tim studied males, while Dan studied females. Which researcher observed that growth in height is about 10 centimeters (almost 4 inches) per year in the average male?

A: Tim

Problem: John spends most of his time on computers. While at work his work computer does not need modern capabilities. So, he still uses Windows 2000 at his office computer. At home it's a complete different ball game. He plays so much computer games at home that he needs a better computer. In his home computer he installed the latest version of Windows. Now, there is no lag in his system. Does John's home computer have less complex or more complex CPU power saving methods?

A: more complex

Problem: Manny visited 2 countries. First he visited Australia, a country which respected the environment and produced zero air pollution, and New Zealand, a country which based its economy on burning fossil fuels and generated a lot of air pollution. Which country had fewer people with increased chances of dying from other diseases?

A:
Australia