I learned the way a monkey learns - by watching its parents.

The sustainability revolution will, hopefully, be the third major social and economic turning point in human history, following the Neolithic Revolution - moving from hunter-gathering to farming - and the Industrial Revolution

A large number of us have developed a feeling that architects tend to design houses for the approval of fellow architects and critics, not for the tenants.

Be neither too remote nor too familiar.

We don't, in a sensible world, want to hand on an increasingly dysfunctional world to our grandchildren.

The simple fact is that the world is not paying for the services the forests provide. At the moment, they are worth more dead than alive-for soya, for beef, for palm oil and for logging, feeding the demand from other countries. ... I think we need to be clear that the drivers of rainforest destruction do not originate in the rainforest nations, but in the more developed countries which, unwittingly or not, have caused climate change.

Hong Kong has created one of the most successful societies on Earth.