1) give up
* stop using
* a lot of
* contaminate
2) running water
* container you put rubbish in
* water supplied to a house
* dirty water
3) bin
* container you put rubbish in
* water supplied to a house
* dirty water
4) challenge
* get rid of
* something difficult
* a lot of
5) a great deal of
* get rid of
* something difficult
* a lot of
6) throw away
* get rid of
* stop using
* container you put rubbish in
7) pollute
* stop using
* contaminate
* somethinh difficult