Work in pairs to solve the quiz.
1. It takes about _______ years for one plastic bottle to decompose in the ground.
A. 4.5 B. 45 C. 450
2. Around _______ plastic bottles are thrown away every year.
A. 13 thousand B. 13 million C. 13 billion
3. Plastic bags and other plastic waste kill around _______ sea animals every year.
A. 100 million B. 10 million C. 1 million
4. Nearly _______ of plastic ever made still exists today.
A. 100% B. 50% C. 10%