Q: Scientists studied two island. One with an old ecosystem named Old island, and the other with a newly formed and forming ecosystem named New island. Both islands were inhabited, Old island being heavily inhabited.  Which island had a more stable ecosystem factoring in the population?
A: New

Q: The southern province was exposed to intensive grazing for many years , and now soil quality is poor and dust storms are present. The northern province has more fertile soil, more trees.  Which province experiences fewer dust storms?
A: northern

Q: The scientists examined both the Eastern and the Western slopes of the mountain. They reached the conclusion that the Western slope was inhabited by many more adult Tasmanian devils than the Eastern slope.  Which slope had fewer adult devils present?
A: Eastern

Q: Two sister cities used different methods to produce electricity. London used fossil fuels, while Edmonton use entirely hydro power to generate energy.  Which city causes less acid rain?
A: