Updated at 11.31pm GMT 7.59pm GMT Dara O'Rourke: why is sustainability so hard?
Despite successful bids, some host cities have found their Olympic sustainability obligations hard to meet.
As it happens, holistic sustainability proved harder to achieve than Mr. Krager and Mr. Becker anticipated.
Sustainability is hard-wired into our civic culture and into a growing number of corporate cultures as well.
Why is selling sustainability still so hard?
Working in sustainability, it's hard to visit other cities and see how much bigger the group is to network with, how many more people there are who 'get it.' When you come back it feels like a desert.
The film's arguments about sustainability are convincing and hard to shake.
But the people in charge of the sustainability campaign should think hard about the risks, said Nguyen, who is based in Dallas, Texas, in the US, and how true to that message the images are.
"Part of this is because sustainability is a very hard space (for VCs)," Chung explains, "(it has) very long horizons, very large incumbents and political bureaucracy.
(Carl Hughes) As our poll into the sustainability action you find hardest showed, many of us struggle to shorten showers, eat less meat, or as commenter Leonie summed up: When faced with a £30 two hour flight or a £100 six hour train, I will often fly even though I know I shouldn't.
