Help with environmental science question- electric cars?

Question

(a) Identify and describe two environmental benefits to using electric vehicles in place of gasoline-powered engines for transportation.

(b) Estimate the potential reduction in petroleum consumption (in gallons of gasoline per year) that could be achieved in the United States by introducing electric vehicles under the following assumptions.

1. The mileage rate for the average car is 25 miles per gallon of gasoline.

2. The average car is driven 10,000 miles per year.

3. The United States has 150 million cars.

4. If 10 percent of United States cars could be replaced with electric vehicles.

(c) Some people have suggested that electric vehicles only shift the emissions of air pollutants from dispersed sources to point sources. Explain and defend or refute this statement.

(d) Propose two potential new United States government policies that would encourage the widespread use of electric vehicles. Explain.

Answer 1

 b:6 billion gallons