saving the planet

Many coastal areas that are dependent on fishing for their local economies have struggled recently because of overfishing. Scientists have been working with these communities to reestablish the fish populations.

Which of the following would not be a recommendation of the scientists to help the local communities?

• bring in non native fish to the environment

• Create an artificial reef for a fish habitat

• Fishing limits on fish caught

Engineers are developing new cars that use fuel sources other than gas. These cars cost less to use. They also make fewer waste products than gas-powered cars. If more people start driving these new cars, what will be the most likely result?

• lower levels of air pollution

• more public transportation

• less road construction

Sanitary landfills were created to dispose of wastes created by people. Based on this image the most likely reason for the plastic liner is that it-

• it keeps animals out

• keeps groundwater from being polluted

• allows for more waste to be collected

Some research has shown that the burning of fossil fuels contributes to an effect called global warming, which scientists believe is changing the chemical makeup of Earth’s atmosphere. Use of which invention would help lower this effect?

• battery powered radio

• electric car

• digital camera

Recycling paper reduces the number of trees cut down for paper production. How does this reduction most likely benefit the environment?

• keeps animal homes from being destroyed

• saves nonrenewable energy

• eliminates air pollution

Which of the following could limit the supply of a renewable resource?

• cutting down trees in forests

• recycling cans

• conserving freshwater sources

What is a way of improving air quality?

• using solar to produce electricity

• burning wood in a fireplace

• driving large cars

Cities control the amount of pollution that is allowed to come from cars. How does this most likely help people?

• Cars travel at faster speeds

• the air stays cleaner

• It becomes safer to drive

When people throw away trash, it is taken to landfills in garbage trucks. Landfills take up space that could be used for something else. Using technology can reduce the amount of trash that ends up in landfills. Which method can help reduce the amount of trash in landfills?

• add liners to keep landfills from leaking

• recycling plastic and paper waste

• using fuel from sugar cane to power garbage trucks

Increasing carbon dioxide in the atmosphere may contribute to global warming. Which is an example of one way humans can reduce the carbon dioxide that is added to the atmosphere?

• take short car trips instead of one long one

• ride a bus instead of walking

• ride a bike instead of drive