We should ___ the playground before we go.

Please don’t ___ the young trees in the park.

Factories should not harm ___ with dirty smoke.

We collected ___ from the playground.

Pollution is bad for our ___.

Less ___ means cleaner air for everyone.

They took the garbage to the ___ outside town.

Birds, fish, and foxes are all part of ___.

Wind and sun can give a house ___.

Dad cleaned the ___ so it could make power.

Burning ___ can make dangerous gases.

A clean home can use ___ from nature.

The eco home had strong wooden ___s.

Rain tapped softly on the glass ___.

The children mixed ___ to build a small house.

A small ___ ran near the eco home.

The volunteers ___ bottles when the teacher arrived.

This park ___ dirty before the clean-up.

A rabbit ran across the path while we ___ trees.

People ___ leave garbage here, but now there is a bin.

We were watching wildlife when we ___ a fox.

The town ___ have clean air near the factory.

The children ___ up when the rain started.

There ___ be a garbage dump behind the school.