The UNFAO has demonstrated that forest loss has slowed but ________
A) there will be no forest ecosystems left by 2040
B) all nationally owned forests should be managed by clear-cutting
C) to protect forest biodiversity, forested public lands should be closed to recreation
D) deforestation is now in equilibrium with new planting
E) we still lose forests at the rate of 5.2 million ha/yr
E
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Which of the following can be said about the indoor pollutant styrene?
a. It is found in carpets. b. It is found in plastic products. c. It causes kidney damage. d. It causes liver damage. e. All of these answers
The current population of India is roughly
A) 162.9 billion B) 1.328 billion C) 1.328 million D) 436 million E) 203.4 million
Atmospheric pollution is the worst when
A. coal is burned. B. uranium undergoes fission in a nuclear reactor. C. natural gas is burned. D. geothermal heat is used to generate electricity.
When Calcium (Ca) bonds with oxygen, it gives up two electrons. What is the charge of the Ca ion in this compound?
A) -2 B) +1 C) +2 D) -1