Заполните пропуски правильной формой глагола в скобках. Вспомните правило использования Conditional Sentences Type I:
If the global temperature _________ (rise), sea levels ________ (rise) too.
8. We’ll threaten our own existence if we ________ (not cut down) on waste rapidly.
9. People ________ (run out of) drinking water one day if they _______ (not use) it more rationally.
10. If he _______ (want) to help the planet, then he _______ (have to) change his habits