Sometimes people forget about the most important thing. it's our nature. now people destroy nature. they burn trees, build some buildings, kill some animals and so on.
So, what we can do to keep our nature? Firstly we must stop destroying some forests. because trees give as oxygen. and without oxygen no life. secondly, big problem that people kill some rare animals. they can kill animals like cow or something else, but not animals which are less nowadays. и можешь написать, что неплохо было бы призвать подростков чтобы они не убивали нашу природу, а наоборот помогли очистить её. например провести субботник в один день и т.п.