S1:Is your washing finished?S2:It will be soon. It's now in the spin cycle.S1:I saw someone rinsing something under running water. Isn't that wasteful?S2:Yes.Even though we can get as much water as we need from the engine room evaporator,we still need to make a habit of saving water.S1:Right.I also try not to use too much detergent. That way takes less fresh water to rinse my laundry.S2:The detergent we have is really strong so just one little scoop does the job.Besides,it helps reduce marine pollution as it breaks down easily.S2:OK,I'm done. I'll hang up my clothes now. Wow,you have a lot of clothes to wash!S1:I've been very busy and I hardly have anything clean to wear.S2:You have to stay clean or you'll get sick.Q3:Why does the detergent they have on board can help prevent pollution?