Thank you for your answer!I think @H0peAndFa1th has given a detailed review of your essay. I will give you my opinion. I won't necessarily call your ideas incoherent. I understand what you're trying to say. You want people to use more public transport and make more energy efficient choices. But, I agree the presentation of ideas is a bit incoherent.
I have a question for you. Are you trying hard to write "complex sentences" because that is what people said gets you a higher IELTS band? It is probably correct but you don't have to make a simple idea in to a complex sentence.
For example below sentence.
In the first place, there are 7 billion people in the world. It is a huge number of humans who directly influence our shared home.
"In the first place" phrase is completely unnecessary. I would have just written ... There are 7 billion people in the world who directly impact the environment of our shared home.
Similar idea .. less words ... relative clean to understand your point. If you are being unnecessarily verbose it gives an impression on examiner that you're trying to increase word count of your essay or it may totally confuse him/her.
Lastly, I'm making an assumption (pardon me if I'm wrong) that you wrote those sentences in that way because you were trying to write "Complex Sentences". If yes, my suggestion is once again google and read what are complex sentences. I think many of us may have an incomplete or inaccurate understanding of the concept. You don't need to write a very long sentence for it to be a complex sentence.
My two suggestions
1. Review what exactly is a complex sentence vs compound sentence.
2. Try to keep sentences short. You don't need to write all long sentences.
It was a great help because you have pointed on several moments which I should try to avoid. It is true that it was better to write in your way a sentence which you mentioned. I will try to write shorter sentences and at the same time to keep a main thought from now on.
And an answer to your question, I don't write such long sentences because somebody has told me that it will be good for IELTS. I just write them in such a way. You know, naturally expressing my thoughts how they are in my head =))
But again, thanks! You answer gave me topics about which I should think when I write.