4. Public water supplies are unsafe in some parts of the world because the water and
may carry

In many parts of the world, water taken directly from wells or public supplies is not safe to drink because it may carry waterborne parasites or other diseases. The water can be sterilized by boiling it, but fuel is needed to do so.

Explanation:

 Public water supplies are unsafe in some parts of the world because the water may carry bacteria.

Explanation:

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'

b.

the accuracy of the data.