1. many wildlife habitats will be destroyed, if man keeps (keep) polluting the environment. 2. if we dump all sorts of chemicals into rivers, we will not be able to (not be able to) swim in them in the future. 3. if we don't stop (not stop) cutting down so many trees, we will endanger our oxygen supply. 4. if the global temperature (rise) too. (rise), sea levels 5. people (run out of) drinking water one if they (not use) it more rationally. 6. if a human (want) to help the planet, then he (have to) change his habits.​

nikusachev01    1   11.04.2021 09:17    33