Exam 24: Human Impacts, Biodiversity, and Environmental Issues

Which one of the following energy sources is NOT an alternative to fossil fuels?

Which one of the following actions of humans has not contributed to the worldwide reduction in biodiversity?

A renewable energy source that taps into heat produced deep below ground is called

Power plants are undergoing a process known as "scrubbing" that is expected to reduce the extent of

The Environmental Protection Agency estimates that approximately ________% of rural wells and water systems have some type of pollutant in them.

As DDT accumulates in the tissues of carnivores at increasing trophic levels, the concentration increases; this is representative of ________.

Freshwater is most likely to be polluted

CFCs are the primary air pollutants that destroy the ________.

Although it was one time hoped that nuclear energy would meet most human energy needs, this has not occurred due to expense and safeguards necessary to prevent meltdowns.

The transformation of marginal lands into near-desert conditions unsuitable for future agriculture is referred to as ________.

Twenty-five percent of all prescription drugs sold in the United States are based on substances derived from fewer than 50 species of plants.

Toxicants occurring in aquatic ecosystems are highly subjected to biological magnification, meaning the

The ozone layer can be destroyed by pollutants such as

The main human activities that have raised atmospheric CO₂ levels are

Despite an international agreement signed in 1987 to phase out the production of CFCs, depletion of the ozone will continue to affect Earth and its atmosphere for at least another one hundred years.

Heat is considered a type of water pollution because it increases the amount of oxygen in the water, which leads to the death of plants and the overpopulation of animals.

________ water is a slowly exchanging pool, and once it becomes polluted it is difficult to clean up.

Freshwater is most likely to become contaminated or polluted by ________ from urban and rural environments.

________ refers to heat from deep underground sources used as a source of energy.

Creating a sustainable world will require stabilizing the human population growth rate and the global environment.