Seventy-two percent of the population of Curitiba, Brazil rely on the city bus system on a daily basis.
Answer the following statement true (T) or false (F)
True
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A study of jet contrails following the grounding of commercial flights after the September 11, 2001 terrorist attacks found that
A) contrails have a very limited effect on the Earth's energy budget. B) contrails reduce diurnal temperature ranges in regions with a high density aircraft. C) contrails contribute more to cloud-albedo forcing than cloud-greenhouse forcing. D) contrails are difficult to distinguish from natural cirrus clouds.
Commercial agricultural areas dominated by capitalist social relations include all of the following EXCEPT
A) U.S. and Canada. B) Asia. C) Argentina. D) Europe. E) South Africa.
Governments stimulate trade through
A) doing away with export subsidies. B) market research. C) providing information to exporters about export opportunities. D) supporting international trade shows. E) providing free trade zones.
The most abundant element in the atmosphere is
A. oxygen. B. carbon dioxide. C. argon. D. nitrogen.