Calculating your carbon footprint is necessary, ________ you to understand your impact on the environment. 

a. It’s also a good habit to reduce idling when possible.

b. If you live further away, you can ride the bus or even gather some of your classmates to carpool to school every day.

c. A new school year is a new chance to act against emission pollution and to do your part to improve air quality.

d. While you’re sitting in your car and waiting for class to start, do your best to remember to turn off your car!

e. If you live near campus, you can choose to walk or bike to class!