People will live on other planets, so we will ____. In the future, people will use more clean energy with ____ or hydropower plants. Due to global warming, there will be more ____. There will be ____ to treat people's diseases. There are a lot of people in China, it's one of the places with ____. She wants to buy an ____ to drive without contaminating so much.

Leaderboard

Visual style

Options

Switch template

Continue editing: ?