Anglais : Climate change et First Conditional

Read the short paragraph about climate change and complete the sentences using the appropriate vocabulary and verb tenses.

'Our planet is in danger because of human activities. If we continue to pollute the air, the global temperature will increase by $1.5^\circ C$. We must reduce our $CO_2$ emissions to protect the environment.'

1. Complete this sentence: If we don't recycle, the amount of waste ______ (increase).
2. Find the synonym of 'protect' in the text that means 'to stop something from being destroyed'.
3. Rewrite this sentence using the modal 'should': 'We recycle our plastic bottles.'