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.
U.S. Senators serve 6-year terms, and can serve unlimited number of terms. Senatorial elections are held every two years, with 33 or 34 seats up for election each two years, in a rotation. So if you start with 100 Senators, you have 33 up for reelection in 2018, 33 more in 2020, and 34 in 2022 (Iâm not sure which year actually has 34 seats up for grabs, but you get the gist, I hope).