Discuss, providing specific detail, how human activities such as agriculture, the burning of fossil fuels, and the clearing of forests affect each of the biogeochemical cycles: water cycle, carbon cycle, nitrogen cycle, phosphorus cycle

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.

How many countries have portuguese as a national language?

Where was oil production at its highest in the 1980s and still remains important to the russian economy? central asia the ural mountains russian siberia the caucasus region