Since polystyrene disintegrates slowly, one of the main challenges that it poses on the environment is that exposure to the sun causes it to photodegrade, meaning it breaks apart into smaller and smaller pieces. The broken down material ends up looking like food to small animals.
United States Congress elections, 2016. A total of 469 seats in the U.S. Congress (34 Senate seats and all 435 House seats) were up for election on November 8, 2016. The big story of the 2016 congressional election cycle was whether or not the Democratic Party would be able to regain control of the Senate.
There are a total of 100 U.S. Senators, two representing each of the 50 states. In the midterm election, approximately one-third of the senators (who serve for six years) are up for reelection. Because their six-year terms are staggered, both senators from a given state are never up for reelection at the same time.