Question

In the United States, which of the following would increase energy efficiency?

a.using public transportation and developing more efficient engines for vehicles b.turning thermostats down in winter and up in summer
c.insulating homes and businesses
d.All of the above

Answer 1

Answer:D

All of the above

Step-by-step explanation:

Just take the test

Answer 2

D-All of the above

Step-by-step explanation:

They all would increase energy efficiency.