Bookmarked:

As we click away on our screens and devices, it’s easily forgotten all this consumes natural resources - directly or indirectly:
Bloated websites lead to slow load times, frustrated users and wasted energy.
This microsite lists four aspects of sustainable web design and links to a few interesting resources:
- Findability
- Performance optimisation
- Design & user experience
- Hosting
Long story short: just as with designing for an accessible web, designing for a sustainable web goes hand-in-hand with better user experience: shorter loading times, better performance, simpler concepts. It’s a no-brainer, really.
(On the same topic, this chapter from the O’Reilly book on sustainable web design is also a good primer.)