We will plant more trees. The air will be fresher.

• If we plant more trees, the air will be fresher.

She will use fewer cars. We will reduce pollution.

• If she uses fewer cars, we will reduce pollution.

I will cycle to school every day. We will keep fitter.

• If I cycle to school every day, I will keep fitter.

It will use recycled products. We will save money.

• If it uses recycled products, we will save money.

He will throw rubbish into the right bin. They will keep the environment clean.

• If he throws rubbish into the right bin, they will keep the environment clean.

Mai will turn off the tap when brushing the teeth. We will save a lot of water.

• If Mai turns off the tap when brushing her teeth, we will save a lot of water.

Mary will travel more by public transport. The harmful gases in big cities will be reduced.

• If Mary travels more by public transport, the harmful gases in big cities will be reduced.

He will start at six. We will arrive there before noon.

• If he starts at six, we will arrive there before noon.

The boy eats so may green apples. He will be ill.

• If the boy eats so many green apples, he will be ill.

She will use reusable bags for shopping. We will reduce waste.

• If she uses reusable bags for shopping, we will reduce waste.