Number 5 i need this asap and you

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.

At which point on the diagram do convection currents occur to drive plate movement?

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution