By recycling, we use the same ____________ materials over and over, instead of using more and more of Earth’s resources.

“People need places to buy things like food and ____________. In fact, the restaurant where we just ate is on land that was once a part of the old Smith farm.”

The next day, Claire convinced her parents to help her write a ____________ or a written request.

Building dams created ____________ or artificial lakes.

Then the ____________ of animals that depend on fish for food also goes down.

Well, ____________ (chemicals that kill unwanted plants) and the growth of cities have destroyed much of the natural habitat that monarchs need to survive.

Other people have set up more than 4,000 places across the country to protect butterfly eggs until new butterflies emerge ( come out ) from the caterpillars’ ____________.

The American Indian tribe built circle-shaped ____________ here.

At one time, the mound area covered about 4 square miles, but some of the mounds have been ____________ as farmers plowed fields, people built houses and businesses and workers constructed roads. 

Today, Ohioans are still changing their environment, but we’ve decided to keep the mounds ____________.