Environment Quiz How much do you know about the world around you? Take Fact Monster's Environment Quiz to find out. by Beth RowenLearn more about America's Most Polluted Metro Areas and Earth Day. Question 1 (out of 10): About how long does it take a Styrofoam cup to decompose? 10 years 2 months 400 years 150 years More Quizzes from Factmonster: Try another Science Quiz ! Quiz Archive FEN Learning is part of Sandbox Networks, a digital learning company that operates education services and products for the 21st century.