She gave a TED talk on the subject in 2010.

I just saw a TED talk on this the other day.

It became the second most viewed TED talk of all time.

It's 20 minutes you won't regret, as with any of the TED talks.

Christian's TED talk has been posted, and the link can be found below.

It is the basis of his first TED talk.

Till 2008 his talk was among the top ten TED talks viewed online.

Check out this 6 minute TED talk if you haven't already seen it:

In March 2012 he gave a TED talk on renewable energy.

He promoted this idea in a TED talk in 2009.