Exercise 2. Geothermal heat is having another "revival". Explain how it works in a home and how much it would cost to add this to your home (determine your square footage or use an average 2000 square foot home)? Cite your references. How much would it cost to install enough solar panels on your roof to generate all your daily electrical needs? How many panels (size?) would you need? How can landscaping (trees/bushes) affect your heating and cooling bills?