Because there is so little freshwater, most of humanity manages what water they have in an efficient and helpful way.
Answer the following statement true (T) or false (F)
False
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What are the eight chemical elements that make up over 99% of Earth's crust? What will be an ideal response?
Which one of the following produces the least air pollution?
A) An automobile burning hydrogen as a fuel B) An automobile powered by a hydrogen fuel cell C) A Toyota Prius hybrid vehicle D) A car powered by natural gas
Researchers have suggested four principles for carrying out most forms of ecological restoration and rehabilitation. Which one of the following is not one of these principles?
A. Find the cause of the degradation. B. Stop the abuse by eliminating the causes. C. Encourage the development of economic zones in the ecosystem. D. Reintroduce species, especially keystone, foundation, and pioneer species. E. Protect the area from further degradation.
Which of the following is correct regarding continental drift?
A) It occurred about two billion years ago, but no longer occurs today. B) The term "continental drift" is now called plate tectonics. C) It does not occur because the crust is brittle. D) It is an old theory that has been essentially disproven.