Australia accounts for over ________% of the world's alumina
A) 20
B) 40
C) 60
D) 80
A
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25? Celsius equals ____________________ degrees Fahrenheit
Fill in the blank(s) with correct word
Debris flow has the following properties:
a. Serious hazard in dry areas with heavy rains b. Consisting of soil and weathered soil, with large amount of water c. Often confined to channels d. All of the above e. Both a and b
The different tiers of food production and consumption in an ecosystem within a feeding hierarchy are called
____________________ ____________________. Fill in the blank(s) with the appropriate word(s).
Thermal pollution differs from most chemical pollution in that
A. it is localized in impact and short-lived. B. despite being called "pollution", it causes no real harm. C. it has by now effectively been eliminated as an environmental hazard. D. All of the choices are correct.