glossary
Welcome to our glossary of useful terms and expressions related to sustainability in the m&e sector.
You can search for definitions and explanations using our alphabetical links below or simply by scrolling through.
We hope you find these helpful and you will see as you navigate other pages on the site that each time a glossary term occurs there is a live link to its definition here.
Please contact the site editor Ewen Rose if there are other subjects you think we should include.
- Operational rating
- A measure of the energy usage (and consequent carbon emissions) by a building compared to benchmarks for that type of building – usually based on at least 18 months of historical energy use data. (For new buildings see asset rating).
- Ozone
- An unstable gas formed by the interaction of sunlight with exhaust gases from motor vehicles and from industry and by the action of sunlight on nitrogen oxides and hydrocarbons where it is a primary component of smog.