Which of these would you like to see induced in all building codes?
| Solar panels | 15 | |
| Wind turbines | 1 | |
| Geothermal heating pumps | 1 | |
| Solar water heating | 1 | |
| Methane digester toilets | 2 | |
| Daylighting and skylights | 0 | |
| Green rooftops | 2 | |
| Rainwater collecting cisterns | 0 | |
| Solar paint | 1 | |
| Thermal glass windows | 0 | |
| Ice cooler air conditioning | 4 | |
| Passive ventilation | 0 |