| Air, soil, noise pollution control technology companies |
| Analysis instruments and research laboratories |
| Drip irrigation companies |
| Energy, renewable energy and biogas technologies companies |
| Infrastructure services |
| Plastic raw material vendors |
| Recycling technologies |
| Sludge, rotting, drying, sterilization |
| Solar energy technology and heat recovery companies |
| Storage companies |
| Transport companies |
| Urban cleaning vehicles, equipment and technology companies |
| Waste disposal facilities |
| Waste water and wastewater technologies |