This green roof has over 18,000 plants to help with insulation and reduce runoff.

Water is removed from the product to reduce the mass, and runoff on the stockpile.

Learn how low impact development can reduce urban runoff and improve water quality.

They're also responsible for water filtration, and they help reduce erosion and runoff.

Construction sites typically implement simple measures to reduce pollution and runoff.

By holding water within its root system, the roof will reduce runoff.

These funds will support a program designed to reduce runoff of nutrients from agricultural lands, thus improving water quality.

Most of the new money would go to farmers to reduce runoff from their fields and to states to prevent other forms of water pollution.

"They have also worked with local officials to increase street sweeping, which reduces runoff into the water."

There are more than 150 other elements, including upgrading sewage treatment plants and reducing runoff from farms.