| Value | Category |
|---|---|
| -9 | Don't know (spontaneous) |
| -7 | None of the above (spontaneous) |
| 1 | Heating and cooling improvements |
| 2 | More climate-friendly energy generation on site |
| 3 | Machinery and equipment upgrades |
| 4 | Energy management |
| 5 | Waste minimization, recycling and waste management |
| 6 | Air pollution control measures |
| 7 | Water management |
| 8 | Upgrade of vehicles |
| 9 | Improvements to lighting system |
| 10 | Other pollution control measures |