PCBs are a class of chemicals that don't easily break down, even though they have been banned for over 30 years. These chemicals collect in fat and build up in fish that are fatty and in fish that eat other fish. As striped bass and bluefish migrate up and down the East Coast, they pick up PCBs from eating other fish.
Best Answer: Consider how many tires it has, Each mobile home tire is designed to carry 1 ton. The front tounge is also designed to carry 1 ton. So a mobile home with 4 tires weighs about 5 tons. A mobile home with 6 tires weighs about 7 tons. Plus whatever extras you have put into the home. Source(s):
Source: US Census, Manufactured Housing Institute. Mobile homes make up 6.4% of the US housing sector and there are 8.5m of them, down slightly on 2011, according to the US Census. The number of occupants is not recorded but it's estimated to total about 20 million. According to the Manufactured Housing Institute, about 57% of the heads of mobile home households are in full employment and another 23% are retired. But the household median income is only a little over half the national average.