The congestion on the roads of Manchester could cause the productivity of businesses to decrease, as many workers would get late to work due to the amount of traffic which would increase the amount of time it would take to get there. The fact that it would take longer to get to work because of the traffic, some workers may have to wake up earlier than they would if there was less congestion on the roads meaning they would have to sacrifice some of their crucial sleep and would not be able to reach their maximum productivity or not be able to maintain it for as long. Time also has a monetary value. It costs the UK economy over £20 billion a year in lost output and wasted time.With congestion comes the increase chance of accidents. There is a higher probability that an accident could occur as it only takes one mistake in a car to crash and with more people on the roads, there are more people that could make that mistake. With a higher amount of car accidents, the cost incurred is higher as there are more vehicles that need to be repaired and more needs to be paid by insurance companies which will increase the price of getting insurance. If insurance prices increase, people will have less disposable income to spend on other things to maximise their utility.The compounds released by the diesel cars can react to form acid rain. Acid rain can be extremely harmful to some ecosystems such as fish, plants, water or soil. At pH 5, most fish eggs cannot hatch. At lower pH levels, some adult fish die. Some acidic lakes have no fish. Even if a species of fish or animal can tolerate moderately acidic water, the animals or plants it eats might not. This heavily impacts industries such as the commercial and sports fishing industries, meaning that less fish will be able to be sold and will also deplete the food supply.