Chapter 4 Environment

The Earth's resources can be conserved

• only by the actions of industry
• by reducing the use of nonrenewable resources
• if people do whatever they want to do
• by throwing away all our trash

Endangered species

• are those that are extinct
• are found only in tropical rain forests.
• can sometimes be brought back from near extinction.
• are all protected by the Endangered Species Act.

Global warming is a danger

• only to people living in warm climates
• to organisms all over the planet
• only to life at the poles.
• to the amount of carbon dioxide in the air.

Which of these products comes primarily from a renewable resource?

• motor oil
• fiberglass insulation
• cardboard boxes
• plastic pipes

Which of the following is believed to be most responsible for ozone depletion in the atmosphere?

• PCBs
• CFCs
• pesticides
• lead-based paints

Which of the following habitats is likely to be the MOST diverse?

• a wheat farm
• a pasture for cattle
• the arctic tundra
• a tropical rain forest

Which of the following would help reduce air pollution the MOST?

• haing a lawn instead of flowers
• eating meat instead of beans
• bicycling instead of traveling by car
• using coal instead of nuclear power for energy

Four decades ago, Rachel Carson wrote about the environmental dangers of 

• PCBs
• CFCs
• pesticides
• lead-based paints

Scientists think that an increase in __________ and other pollutants has caused a significant increase in global temperatures.

• oxygen
• carbon dioxide
• nitrogen
• argon

If global temperatures increase, it could get so warm that 

• people would be too hot to do anything.
• most plants and animals would die out
• air conditioning systems would no longer work.
• the polar icecaps would melt, causing floods along coastlines.