1 First are (to) plant trees. 2 As the population (rises not explosion) 3 A lot of trees (being not are) cut down 4 (factors not reasons) of air pollution. 5 trees can (help) clean the air. 6 Secondly, is (no need for trying) to help others. 7 live (on the same planet not in a same plant) 8 (My last solution works better than Finally), is (equality not equal). 9 Now in the 21st century, there are still a lot of (prejudiced) people, and (I) think all individuals 10 world (would not should) not be hierarchical, but be equal.

Good morning, everyone. The subject of my presentation is "Three ways to make the world a better place". The first way is to plant more trees. As the population explodes, air pollution on earth will become more and more serious. A lot of trees have been cut down, and this is one of the reasons for air pollution. In order to control air pollution efficiently, we should plant millions of trees because trees can improve air quality. The second way is to try to help others. Everyone needs help and everyone can help others. We live in the same planet, so we need to help each other in order to make our societies better. The third way is to be equal. Now, in the 21st century, there are still a lot of people who are still prejudiced, and I think all individuals should be equal. I hope every societies in the world today are not hierarchical but equal. This concludes my presentation. Thank you for listening

I'm completly agree with your approach :)