This is my task ;)

How can you keep your environment unpolluted and clean?
Do you know that breathing polluted air can make you sick? The bad news is that you can never breathe completely clean air, at least into a town. (maybe city would be a better word here as they are larger and more likely to be polluted)
It is known that rubbish is a big deal, because, people are throwing out more rubbish now than they were a few years ago and materials are also more difficult to recycle.
Burning garbage in incinerators releases dangerous gases which contribute to global warming and pollution. On the one hand, the (the refers to a specific one you are talking about factories in general here) factories are emitting toxic gases into the air what which it does not contribute to improvement of environment. On the other hand, due to contamination more and more green spaces are disappearing and this fact is an shows overwhelming evidence. (of what - pollution? this sentence is not finished)
Only a few years ago there were trees, plants and little gardens almost in every neighborhood, but nowadays it is difficult to find a green space into the town.
Despite the damage to environment we can still do something about it. It is today when we have to act (this is not gramatically incorrect but a more natural way of saying it is We have to act today) not tomorrow because saving the environment in our town is importanat and it is our moral duty to care for it.
There are a large number of Here are some tips which can make a huge difference in our environment if we implement them in our daily routines.
Buying our clothes in factories that are respectful with of the environment, sharing your car with mates, using public transport rather than driveing your car, and recycling rubbish, it which is worth the effort.
As the song says ‘this land is your land'.