1-our planet wouldn`t de so polluted
2-they would save a lot of tress and farm animals
3-we would have less litter in towns and the countyside
4-fewer tress would be cut down
5-there would not be so much of rubbish in the streets 
6-our towns would be ideally clean

1. then the planet was cleaner
2. it would save nature and energy
3. it would save natural resources
4. it would save forests
5. our streets would be cleaner
6. it would make our enviroment better