1. Hydropower represents what percentage of total electricity production globally?

2. The greenhouse effect is caused by the burning of fossil fuels.

3. Which country is the global leader in the number of solar power systems installed per capita?

4. Over the U.S., ozone levels have fallen 5-10%, depending on the season.

5. The CSIRO estimates that by 2050 average temperatures in Australia will rise by how much?

6. Life-cycle cost is the sum of all recurring and one-time (non-recurring) costs over the full life span of a good, service, structure, or system.

7. Net-zero energy refers to a building or installation that produces as much energy as it consumes, considered to be energy self-sufficient or near self-sufficient.

8. According to USGCRP data, since pre-industrial times (around 1850) atmospheric carbon dioxide (CO2) has increased by what percentage?

9. According to the World Bank, climate change adaptation practices may cost as much as how much each year by 2030?

10. In 2010, global private investments in nuclear energy totaled what value?