A typical automobile gets 30 miles per gallon of gas and drives 12,000 miles every year. Assuming that octane (C8H18, density 0.7025 g cm-3) is a principal component of gasoline;
How much oxygen is required for a car to run for 1 year?
How much CO2 is produced by the car in 1 year?
How many trees are required to remove the CO2 produced by the car in 1 year?