Hi can you help me with my essay is about the pollution. Thanks

Nowadays, many people in the world have become aware of the problems about pollution and the environment. Also, different organizations have started to promote awareness campaigns to individuals can do to solve the problem.
On the one hand, we can do and propose many things to stop the pollution and reduce the risk to live in the city. People can take public transport to avoid the increasing the global car production. In addition, some companies with campaigns encourages the citizens to plant more trees.
On the other hand, we should reduce, reuse, and recycle as much we can in our houses, for example, instead of throwing away ground coffee residues, it can be used as a compost in our backyard. Moreover, we can recycle items such as cans, glass, and papers. The recycled newspaper can be converted as toilet paper.
To sum up, there are many ways to reduce the pollution and damage to the environment. I personally feel that people around the world are taking care our planet.

What is your exact assignment? It's hard to tell if your writing follows the prompt/directions or not.

"On the one hand" and "On the other hand" should be used to describe or explain opposites. You have used them to describe or explain similarities: All the ideas included in both paragraphs are for reducing pollution, so those two transitional phrases don't make sense.