I heard that there were alligators in the sewers.

In southern China in particular, toxins have been discharged with sewage by mining operations and made their way into rice paddies.

Valves control fluid flow and regulate pressure.

For all the activities like shaving, showering, grooming etc.

Often what jams us up is sewage.

Over 2.5 billion people in the world today do not have proper access to water and sanitation.

The wastewater produced by the city still is not treated and is discharged raw in Santo Antônio River.

The sewage is still thrown in the bay with virtually no treatment.

And when we were walking through the narrow alleys, it was literally impossible not to step in the raw sewage and the garbage alongside the little homes.

Another common complaint relates to the sewage smell inside their houses.

New Orleans As the eye of Hurricane Katrina swept to the northeast, it subjected the city to hurricane conditions for hours.

At the same time a treatment plant that would treat the waste water before reaching the beach was created, but the Rio Águas , which is responsible for the station, does not do its work and dumps all the sewage in natura through this culvert.

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

Michael Pritchard Okay. We've got some runoff from a sewage plant farm.

If it weren t for the problem with the sewers, we would already have built the house.

One exposes the problem of sewage spill on São Conrado Beach.

When untreated, sewage can have serious impacts on the quality of an environment and on the health of people.

Well, the reason we're doing this offshore is because if you look at our coastal cities, there isn't a choice, because we're going to use waste water, as I suggested, and if you look at where most of the waste water treatment plants are, they're embedded in the cities.

The pyramid, if we jam things in the bottom, can get backed up like a sewer line that's clogged.

As of November 2010, less than 50 of the city's sewage receives proper treatment.

You had water, sewer networks that allowed for this kind of unchecked expansion.

We wouldn't tolerate our parks being swamped by human sewage, but beaches are closed a lot in our country.

And if we jam nutrients, sewage, fertilizer in the base of that food pyramid, it can back up all through it.

But there are still major problems in local infrastructure, such as paving roads, sewage and water supply.

There are two basic approaches to use the waste in the water as a resource (such as constructed wetlands) or strictly as a pollution (such as the majority of today's treatment plants).

It is a little bit like having a waste treatment plant right next to an amusement park ...

The Riacho Salgadinho is also the destination for most of the sewage system in Maceió downtown.

According to the organisation, half the population in Rio de Janeiro is still without mains water and sewerage . This accounts for nearly 3 million citizens who are to drink dirty water or throw sewage directly into the rivers, lakes and beaches of this wonderful city .

Most of the bedrock of the Vale of Aylesbury is made up of clay and chalk that was formed at the end of the ice age and at one time was under the Proto Thames.

So, I sent them to Boise, Idaho, where they dropped a plastic bottle into the Boise sewer system.

If you include all the drain, it takes more than a hundred pints of water to make a pint of beer.

The street grid of the city of Lima is laid out with a system of plazas that are similar to roundabouts or junctions.

This uncontrolled growth has caused significant difficulties in terms of traffic, sanitation (including access to safe water), and pollution.

Regal executed his finisher, the Regal Cutter, on Stratus and Stephanie then dumped sewage over Stratus' body.

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 live in salt water, so they die.

Urban planning guides and ensures the orderly development of settlements and satellite communities which commute into and out of urban areas or share resources with it.

It was the fifth country in the world to install modern city sewers, the third to have sewage treatment and one of the pioneers in the installation of a telephone service.

Such are the Tekezé River in the north, the Abay in the center, and the Sobat in the south, and about four fifths of the entire drainage is discharged through these three arteries.

We also set up experiments in San Francisco at one of the three waste water treatment plants, again a facility to test ideas.

It's a city with about all streets of urban zone paved and services of water and sewage to all people.

Rube graduated from the University of California, Berkeley in 1904 with a degree in Engineering and was hired by the city of San Francisco as an engineer for the Water and Sewers Department.

Disposing of wastewater underground will inevitably contaminate water resources, harm our generation, and pass along the damage to the next.

Dhaka's unclean water bodies including an inadequate sewage system are blamed for the growth of mosquitos and the diseases they spread.

If you flush a toilet, your feces will go to the sewage treatment plants, which are sold as assets, not liabilities.

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.