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Environmental engineering

Gardens blanket the roofs of shops in Copenhagen.

It’s not just the bikes — green rooftops help make Copenhagen the world’s greenest city

Environment

Copenhagen is the greenest city in the world, and its carefully planned green rooftops are helping it reach that spot. The rooftop oases help trap carbon and water, support biodiversity and help the city prepare for the warmer future that’s coming thanks to climate change.

Power From Food Scraps

U.K. researchers develop new grass type to better capture water runoff

Environment

New research discovers high levels of caffeine in surprising areas of ocean, rivers

Environment

DIY: How to turn urine into fertilizer

Business, Economics and Jobs
The World

Microbes Transform Wastewater to Energy

Researchers at Penn State University are developing microbial fuel cells to turn wastewater into electricity.

The World

Low Salt Water with Low Energy Technology

A chemical engineering team from Yale has devised a creative way to remove salt from seawater. This new desalination technology uses little electricity and could provide fresh drinking water at a fraction of the cost of current methods.

The World

Problems Underground

America’s sewers are aging and unable to keep up with the amount of sewage and water put in them.

Green Roofs

In heavily-paved urban areas, a good downpour can quickly overwhelm a municipal sewer system. But an ancient building technique that’s popular in Europe suggests a way to alleviate the problem: add a touch of green to the roof. Roof-top vegetation provides insulation, cooling and waterproofing; and it can help prevent runoff, too. Here in the […]

Green Roofs

In heavily-paved urban areas, a good downpour can quickly overwhelm a municipal sewer system. But an ancient building technique that’s popular in Europe suggests a way to alleviate the problem: add a touch of green to the roof. Roof-top vegetation provides insulation, cooling and waterproofing; and it can help prevent runoff, too. Several German cities […]