Choose the best word or word combination to complete each sentence.

Choose the correct option.

Lots of people and animals on the island are in [danger|dangerous|endangered] because of the volcano eruption.

Jane believes that [home|homeless|homelessness] is a very important social issue in her country.

Did you know that cars and other vehicles [pollute|polluting|pollution] ground, water, and air?

Winters are becoming less cold because of global [warm|warmer|warming].

What can we do today to protect the [environment|environmenal|environmentally]?

Tell me more about the [house green|green house|greenhouse] effect, please!