From the perspective of environmental science, a good traffic environment can reduce air pollution

reduce the number of private cars and reduce tailpipe emissions; Improvement of the fuel equipment of the car, the use of hybrid vehicles.

The pollutants are mainly CO, HC and nitrogen oxides emitted by the car during operation.

They can cause the greenhouse effect, form acid rain, produce photochemical pollution, and more.

From the perspective of the car itself, it can be improved from aspects such as the engine and emission catalysts; In terms of traffic, road traffic should be optimized, the average speed of vehicles should be increased, and the delay time of vehicles during operation should be ......reduced

How we change the environmental impact of our transportation. We should not throw garbage on the road in traffic. No one is parked around.

Not cold. Nothing, something to go about, traffic. Traffic laws must not be violated.

Don't run red lights, be orderly. Moving vehicles. Don't go against traffic laws.

Know the rules of the road. Uninhabited. To cause traffic for everything, violation of the law and liability.

a. The error caused by the exhaust gas emitted by coal combustion, the air pollution of many urban traffic arteries is seriously exceeding the standard, and the main reason is: hundreds of thousands of cars, motorcycles, etc. emitted exhaust gases are made of fiber, so the choice is wrong;

b. According to reports, the air pollution of many urban traffic arteries is seriously exceeding the standard, and the main reason is: hundreds of thousands of volts of exhaust gases emitted by cars, motorcycles, etc., so the choice is correct;

c. Errors caused by waste residue, waste water, and waste gas in industrial production, so the options are not closed;

d. Errors caused by continuous rainfall and discharge of various sewage, so the choice is wrong; Therefore, choose B

Generally speaking, the use of electricity is less polluting to the environment than the use of oil, and it does not emit exhaust gases; Vehicles using compressed natural gas are less polluting than those using oil, and gasoline vehicles are less polluting than those using diesel.

To control the pollution of traffic to the environment, one is to ensure the quality of oil products; the second is to have an efficient engine; Third, the traffic roads should be smooth; Fourth, the collision and annihilation advocate public transportation, and try to reduce the use of small cars; Fifth, vigorously advocate the use of electric energy as an energy source of transportation.

d. This question examines the city.

The impact on the geographical environment in the source process is determined. Cities are the areas with the most profound and concentrated human impact on the environment, and they are also the areas with the greatest environmental changes. Due to the irrational development of cities in some areas, a series of problems have emerged, such as land being occupied, cultivated land being reduced, land sinking, water quality deteriorating, environmental pollution, difficulty in finding employment, disorderly order, traffic congestion, and housing difficulties.

The root cause of environmental problems in many cities is overpopulation. So option D is selected for this question.