Environment performance is based on:
- Resource Use — intensity of energy, material and water consumption, and use of renewable sources of energy and materials Greenhouse Gas Emissions — intensity of greenhouse gas emissions
- Other Emissions — air emissions, wastewater, and hazardous waste releases
- Compliance Management — environmental liability, fines and penalties, and environmental capital investment.
The chemical industry in general has made considerable progress on environmental performance over the past few decades. The recent performance of the 11 companies included in this analysis also indicates continuous improvements — for a variety of emissions, there is a clear downward trend, despite increasing production.