no. 5

water pollution~~i think water polution is not as scary as global warming~~~but it still is a problem for us~~~~in fact~~~in taiwan, more and more water is polluted~~~and the reasons is that more and more factory are build~~~and the only way to clean water is up to government~~~~~~and i think china will have that kind of problem~~~~hahahahahahaha~~~~~jk~~because china will have more and more factories~~~!