Michael Pritchard Okay.

Some cities just release the water.

They literally flipped the switch.

It's horrible!

I want a map covering the storm drain system in this area.

You can get a drainage grant these days.

The school drains the pool once a month.

Lately he'd been living in one of the downtown storm drains.

The waste water that leaks out is water that already now goes into that coastal environment, and the algae that leak out are biodegradable, and because they're living in waste water, they're fresh water algae, which means they can't

In brains full of long sewage pipes of school wall, tarmac and welfare papers the buzzing of insects must enter.

I want a man at every other drain entrance along this line.

Do they, perhaps, include green infrastructure, so that we can take runoff and water that's going out of our houses and clean it and filter it and grow urban street trees?

So different cities around the world treat their waste water differently.

It leaks. It's struck by lightning.

He'll head down this drain to where it comes out of the Rio Hondo.

If there's a region of low pressure in the atmosphere, air is pushed toward it,

This is the city of San Francisco, which has 900 miles of sewer pipes under the city already, and it releases its waste water offshore.

Then after every episode, I had to go up to the bathtub and swim around the bathtub and look at the drain, because that's all there was to look at.

The dome has an incredible amount of water that washes off of it, as well as wastewater.

So, in fact, it's not permanently in the high seas.

Now how many of you have ever gone to a state park or a national park where you had a big sign at the front saying,

So let me show you how the system works.

Here's an image of what we could do in San Francisco Bay.

Yes, we are less prone to falling sick.

They were not related to her, but they tried to find out,

It has to substantially eliminate emissions of ammonia, nutrients, pathogens, heavy metals, odors, and have zero discharge of wastewater to ground or surface waters.

Looks like he was washed down the entire length of the runoff channel.

Its outer wall is solid rock but for a small culvert at its base which is little more than a drain.

Now, when the event is reached, the sender raises his torch to signal that they should both stop the flow of water.

The waste systems all connect.

This is a photograph I found lying in a gutter in New York City about 10 years ago.

So your house is dealing with leaks all the time, but it's fixing them.

The pH of 11, and yet it had chemosynthetic bacteria living in it and at this extreme environment.

Under Los Angeles is a vast and intricate system of huge storm drains... built to siphon off the flash floods of the rainy season.

As you can imagine, the town had been devastated.

Right. What's next? Botanical gardens faulty porous circuit.

If you look at carbon dioxide from burning tropical rainforest, or methane coming from cows and rice, or nitrous oxide from too many fertilizers, it turns out agriculture is 30 percent of the greenhouse gases going into the atmosphere from human activity.

After swishing, rinse the produce under cool running water.

And all this time,

In the case of the shower does it have hot and cold water, two taps that work, a shower rose to get water onto your head or onto your body, and a drain that takes the water away?

As evident in this slide from Lake Nabugabo in Uganda, the agricultural runoff from this crop, which goes into these buckets, is the sole source of drinking, cooking and bathing water for this village.

Well, what if we go to Madison Square Park, and we imagine it without all the cars, and bicycles instead and large forests, and streams instead of sewers and storm drains?

I bet you didn't know, it takes about 5 pints of water to make a pint of beer.

So how does it work? I sort of showed you how it works already.

It accepts algae and detritus in one end, and through this beautiful, glamorous set of stomach organs, out the other end comes cleaner water.