In 2012 the world's population surpassed
a. 6 billion.
b. 7 billion.
c. 8 billion.
d. 9 billion.
The Green Revolution refers to the
a. Iranian uprising in 2009 that still continues today.
b. dramatic gains in agricultural yields in many developing countries, caused by increased use of fertilizers,pesticides, and new crop breeds.
c. enormous Texas-sized algae bloom in the Pacific Ocean caused by overuse of fertilizers among agriculturalproducers.
d. emergence of Ralph Nader in the 2000 election.
World population is growing mainly because
a. people are having more children.
b. immigration is at such high levels.
c. mortality has decreased so dramatically.
d. agricultural yields have grown so exponentially over the last decades.
By 2025, many estimates claim that the world's population will exceed
a. 5 billion people.
b. 8 billion people.
c. 9 billion people.
d. 12 billion people.
Those resources that can be sustained indefinitely, as long as the state of consumption does not exceed the natural rate of replacement, are known as
a. renewable resources.
b. cornucopian deposits.
c. positive externalities.
d. absolute gains.
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