Defining Relative Clause

An environmentally-friendly product is a product______________ will not harm the environment when you use it.

It was 2005 ______________ the Kyoto Agreement on global warming came into force.

Glass ____________ has been recycled can be used again.

Deforestation happens in an area ___________ all the trees have been cut down.

Rain________ is polluted with chemicals from factories is called acid rain.

A farmer ___________ farm is organic does not use harmful chemicals to grow food.

The greenhouse effect is something ________ happens when the sun's heat is trapped close to the Earth by pollution.

An ecologist is a scientist __________ studies the environment.