1)like all natural substance,it is easly give down by bacteria
2)if a piece of electical equipment bum out,it gets too hot and stop working
3)technicians are working hard to come up with a solution to the problem
4)reed beds are used to kill out most of the pollution
5)when they die, plants break off gases such as carbon dioxide and methan
6)fibre in the diet is thought to pick against heart disease
7)antibiotics may guard off beneficial bacteria
8)i don't think this radio can filter up foreign staions
