| Over the past several years we have all become | | | | 12% for materials) |
| painfully aware that CO2 emissions from fossil fuels | | | | Industry = 24% |
| likely play a significant role in worldwide climate | | | | Other Transport = 15% |
| change. Our insatiable demand for energy is driving | | | | Passenger cars = 9% |
| prices up and generating more CO2 than ever. | | | | Energy from Many Sources |
| How Much We Use | | | | There has been a lot of conversation about |
| Today, the world uses about 12 Terawatts per year | | | | renewable energy sources such as solar, wind and |
| for all uses. That is 12,000,000,000,000 Watts. In a | | | | others. One would think we are now generating 30% |
| separate article I reviewed these sources of use | | | | of our overall needs from these sources. |
| which break down as: | | | | Unfortunately, that is not the case. |
| Built Environment = 52% (40% for operations and | | | | |