Some people think that trucks are the main cause of ecological problems in big cities.
Nowadays some people hold the opinion that most of ecological problems in big cities are mainly caused by heavy transport. However, others believe there are a lot of factors that badly influence on the environment and trucks are not the main ones. So what is an essential cause of problems related with pollution of the environment in big cities?
To my mind, there are a number of things that badly affect our world today. That is why I think trucks are only one of all possible causes of ecological problems, but not the main. First of all, there are usually a great deal of factories and plants in big cities, which have a considerable impact upon city environment as well. Besides, a huge number of cars, motorbikes, which
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