(41.) Evaluate the cost and benefits (both economically & socially) of using coal, oil, and natural gas. In your evaluation provide the pros & cons for which each energy source.

(42.) Describe three (3) push and three (3) pull that have influenced the demographic shift from rural areas to urban areas.

(43.) Describe 10 things you can do to reduce consumption of water, energy and or any other resource. (1 point for each accurate action)

(44.) What does the acronym ENSO stand for? Describe the repercussions in weather systems for Australia, Indonesia, North America and South America from ENSO.