Question 203 out of 3 pointsWhich of the following (pick 1) is a secondary source of energy (i.e., an energy carrier)?
Question 213 out of 3 pointsWhich of the following is NOT a greenhouse gas (GHG)?
Question 223 out of 3 pointsMost petroleum consumed in the U.S. is used for ____________.
Question 233 out of 3 pointsNatural gas use is on the rise, partially due to fracking technologies which have made it easier to access natural gas supplies (and has driven the cost down).
Question 243 out of 3 points