Frost occurs when dew freezes
Indicate whether the statement is true or false
False
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Much of the increasing global need for electricity can be met by solar sources because
A) about 70% of electrical demand occurs when the sun is shining. B) modern battery technology now makes electrical storage cheap and efficient. C) only about one square meter of photovoltaic cells are needed to heat a home. D) even at night most solar power systems run at about 50% of normal capacity.
President Reagan's plane came close to being brought down by a
A) microburst. B) dust devil. C) gravity wave. D) willy-willy. E) Boulder windstorm.
Of the 80,000 registered synthetic chemicals in commercial use, only ____% have been adequately tested to determine whether they are carcinogens, teratogens, or mutagens.
A. 2 B. 8 C. 20 D. 35 E. 45
Environmental justice is:
A. Directed only at wild nature. B. Not linked to community-based organizations. C. Related to laws passed by Congress in the early 1900s. D. The social justice expression of environmental ethics.