What are three factors in the composition of soil?

Atown is built on the banks of a small lake on the edge of a desert. after some time, the townspeople discover that water from the lake has become too polluted to use. describe one way that the lake may have been contaminated by the actions of the townspeople, and explain how the townspeople can remediate this problem.

2/6 of be by to 2/6 is to 24/72 ?

Suggest 3 different reasons why there is an ageing population in the uk .