| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    1.7%
                                 | 
| -7 | None of the above (spontaneous) | 4 | 
                                    
                                    1.4%
                                 | 
| 1 | Heating and cooling improvements | 88 | 
                                    
                                    30.3%
                                 | 
| 2 | More climate-friendly energy generation on site | 9 | 
                                    
                                    3.1%
                                 | 
| 3 | Machinery and equipment upgrades | 48 | 
                                    
                                    16.6%
                                 | 
| 4 | Energy management | 17 | 
                                    
                                    5.9%
                                 | 
| 5 | Waste minimization, recycling and waste management | 62 | 
                                    
                                    21.4%
                                 | 
| 6 | Air pollution control measures | 2 | 
                                    
                                    0.7%
                                 | 
| 7 | Water management | 4 | 
                                    
                                    1.4%
                                 | 
| 8 | Upgrade of vehicles | 22 | 
                                    
                                    7.6%
                                 | 
| 9 | Improvements to lighting system | 29 | 
                                    
                                    10%
                                 | 
| 10 | Other pollution control measures | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 665 |