Your essay is wonderful and very interesting. I have a few suggestions on how to improve it:
Many people think that there is no scope (i know there is an Italian word "scopo" that means purpose, but scope in english doesn´t mean purpose. A better word to use here would be purpose or benefit) for making little improvements in their behaviours for the environmental benefit. Despite what these people believe there is(use are instead of is) a huge number of environmental issues that can be solved step by step thanks to individuals. In this Essay I will discuss two main behaviours that can make a difference for the future Earth: recycling and using ‘green’ vehicles such as bicycle and car pool (It would be more appropriate if you saved the specific examples for later in the essay. So here you could say "recycling and using "green" means of transportation.).
In the first place, recycling waste such as plastic, paper or aluminum cans reduces carbon dioxide and that means a reduction of global warming causes. There are different ways of recycling: not only making the recycling program of your town or school, but also using papers and glass more times before wasting them. It is often said that recycling programs is(use are instead of is) only a drop in the ocean because that detele "that") too few people participate, however this project was created just few years ago and an increasing sensibility (a better word to use here could be "awareness" or response", with the aim of social advertisement, has been seen in the last years.
In the second place, going to work sharing a car (commonly known as car-pool) or with the bicycle or with trains will lead to a reduction of pollution. Although a number of people think that these are uncomfortable ways of travel, nowadays car pooling is becoming very popular because it provides not only environmental but also economical benefit.
From my point of view it is only laziness ("indifference" could be a better word to use here. It fits in better with the tone of your essay.) when people refuse to make just this simple changements (the correct word is "changes" or "adjustments") in their life. We must look to next generation and not leave them a destructed planet . In my opinion individuals’ actions can make a difference.