When I told him anything weird was going to cost extra, he grabs me, starts dragging me over to her, so I introduce him to my pocket protection.

That didn't seem to bother you in 2002, Seattle, I believe, when you revealed the names of your "premium" donors to some of your patients and charged extra for their... services.

They don't do any business, they don't even know how much to charge, and they have a load of security cameras.

(Grunts) Hopefully I won't moon you. (Laughter) You didn't pay for that. (Laughter) And I want you to just think for a minute, because we all have – I love to use the analogy "the inner snooze button" – you have these amazing ideas that bubble up.

On the other hand, change the frame slightly and create charitable yield management, so the extra money you get goes not to the bridge company, it goes to charity...

So even if my rocket was slightly more expensive and the fuel is a little bit more expensive, I can run 10x at least what they're running in a day, and really make the revenue that I need to out of that system.

Now, one or two euros, that isn't really a lot of money, I mean compared to parking charges and running costs, etc., so you would probably expect that car drivers wouldn't really react to this fairly small charge.

This is the last day with the congestion charges, July 31, and you see the same street but now it's summer, and summer in Stockholm is a very nice and light time of the year, and the first day without the congestion charges looked like this.

No, on the contrary, they changed, up to a point where we now have 70 percent support for keeping the charges, meaning that -- I mean, let me repeat that: 70 percent of the population in Stockholm want to keep a price for something that used to be free.

Pedestrian zones, congestion fees, emission limits in cities like California cities have, there's lots and lots that cities can do even when opaque, stubborn nations refuse to act.

We're even working directly with elected officials, advocating for more equitable pricing, because to see this vision of energy equity and resilience succeed, we have to work together sustainably.

And in this case, Zambia went from having a cost of electricity at 25 cents a kilowatt-hour, and by just doing simple things, doing the auction, changing some policies, we were able to bring the cost down.

After being disconnected from the grid for months because the power company couldn't figure out how to collect bills, one settlement designed a system that collectivized remittances and got everyone cheaper rates into the bargain.

The residents in Flint have been forced to drink with, cook with and bathe with bottled water, while paying the highest water bills in the country for water that is infected with deadly legionella bacteria.

The electric company in this nation operates under a rule, which says that it has to sell electricity at a very low, subsidized price -- in fact, a price that is so low it loses money on every unit that it sells.

So he tried to change the rules for pricing on electricity, but ran into a firestorm of protest from businesses and consumers who wanted to preserve the existing subsidized rates.

It takes into account everything from the pitcher match-ups, to the weather, to the team records, in setting prices for the consumer.

(Sighs) (Laughter) Within a week, I received a call from Earthlink that said, due to a 10 cents per megabyte overage charge, I owed them 30, 000 dollars.

If you divide the amount of water into what the farmer was paid, the farmer didn't receive enough money to pay a decent price for water in any of those commodities.

So, let's charge them a weekly subscription fee to use our program, but -- if the students complete their weekly maths goal, we'll refund the subscription amount directly into the child's bank account.