Making a case for returning airships to the skies

Reintroducing airships into the world's transportation-mix could contribute to lowering the transport sector's carbon emissions and can play a role in establishing a sustainable hydrogen based economy. According to the authors ...

Elbows key for walkers' efficiency

Wandering through the Harvard campus one day in 2015, graduate student Andrew Yegian recalls how something unusual caught his eye. "I noticed a person running with straight arms," he explains. This really stood out for Yegian, ...

Can Switzerland succeed without fossil fuels?

If we want to get rid of fossil fuels nationwide, there is a lot to do. It will be a generation project, that much is clear. Empa researchers Martin Rüdisüli, Sinan Teske and Urs Elber have now calculated how long and steep ...

Well-meaning climate measures can make matters worse

Lifestyle changes can reduce our greenhouse gas emissions and help protect nature. While some actions offer great potential, some aren't as effective as we think and may even require more land and water, such as shifting ...

Circular cities of the world: What can green infrastructure do?

More than half of the world's population currently lives in cities while projections show an increase to two thirds by 2050. Many people living in small areas means large amounts of waste, high resource consumption and loads ...

What role can households play in the energy transition?

What role can households play in the energy transition? Can changes to everyday practices make a difference? The European ENERGISE project, led by the University of Geneva (UNIGE), in Switzerland, carried out an experiment ...

Making computers, mobile devices more energy-efficient

A computer's cache is a part of the memory where frequently used items are stored to speed up processing. If you visit the same websites on your phone frequently, for example, your phone might save information about those ...

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