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