(a) The T term can be broken into two terms. What are these two terms, and what are their units?

(b) If we switch from fossil fuels to solar energy, which of the terms changes, and does this term increase or decrease?

(c) If we convert from traditional incandescent lighting to LED lights, which of the terms changes, and does this term increase or decrease?

(d) If we switch from natural gas to coal, which of the terms changes, and does this term increase or decrease?