Best to quote them directly from their website:

Our Mission is to radically improve the sustainability of the built environment, by transforming the way it is planned, designed, constructed, maintained and operated.

A built environment that enables people and planet to thrive by:

Mitigating and adapting to climate change

Eliminating waste and maximising resource efficiency

Embracing and restoring nature and promoting biodiversity

Optimising the health and wellbeing of people

Creating long-term value for society and improving quality of life

One cannot disagree with any of that. It is an excellent and dynamic lobby group that is really making waves in improving the industrial environment. I made a series of short videos for them in 2019, including the one above.