Here's a list of questions that I feel I should know the answer to - by heart - if I want to consider myself an advocate of clean energy.

• What are the US's annual carbon emissions? How do they stack up against other major polluters?
• How many kilowatts does the US use annually?
• How many KWH does the average home use every month?
• How large would a solar array have to be to provide electricity for the entire US (let's ignore the storage question for this one)?
• How many watts of power does and average household use each year?
• How many average solar panels would be required, if working continuously, to meet all of a house's power requirements (assume ideal conditions and assume water is heated separately)?
• How many watts of power/mile are consumed by an electric car driving at 25, 45, and 60 miles/hour?
• Could one massive wind turbine produce enough energy to power a single household?
• How much power could one produce riding a stationary bicycle type power generator?
• How much CO2 does a lawn mower produce? a weed whacker? a rototiller? Leaf blower?
  
• How much oxygen does an average sized city tree produce? And how much CO2 does it consume? And how many trees are needed to provide enough O2 for one person?
  
• How is a unit of carbon measured when calculating the cost of manufacturing it?
• Describe an example of how embodied energy is used to justify a purchase?
  
• Is the energy required to recycle the different materials justifiable, vs. the energy used to produce the same product with new materials?