i found it difficult-ish
because i didnt know what to write,
never learnt anything like that...
so i made it all up.
Basically i said (water collecting)
-desalinisation plants produce carbon dioxide from energy + take up space(habitat)
-increased factory + car use makes acid rain + storm water is polluted so collection isnt gonna help anything
-use a combo of recycling + decreased water usage etc. as a solution.