?Historian, conservationist, and writer Wallace Stegner called National Parks, "the best idea America ever had."
Answer the following statement true (T) or false (F)
True
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Photochemical smog is formed when primary pollutants interact with
a. Sunlight b. water vapor c. sulfur dioxide d. Oxygen e. Carbon
An elongated zone of high pressure is known as a ________
Fill in the blank(s) with the appropriate word(s).
What does the HDI (Human Development Index) measure?
a) The gross national and gross domestic products b) Physiological growth rates of impoverished children c) The extent of human misery that results from poverty and environmental problems d) Quality of life indicators such as literacy, life expectancy, standard of living and purchasing power
Which of the following make HIV such a deadly and persistent virus?
A) It attacks helper T cells. B) It is slow acting. C) both a and b D) neither a nor b