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Are made up of many thin layers of semiconductor. An injected electron makes a small energy transition as it moves from one layer to the next, emitting light on each cascade. Because the energy steps are small, quantum cascade lasers can produce long-wavelength mid-infrared or terahertz radiation.

Rising seas imperil the delicate web of cables and power stations that control the internet.

A roadblock to sustainable energy solutions is coming unstuck.

• By Andrea Thompson on July 1, 2019

Overcharged.

Commentary: Private investors are excited about renewable sources like solar and wind, but they need to focus on energy storage going forward.

Eleven million people had renewable energy jobs in 2018, according to the latest analysis from IRENA. New data shows that the diversification of the renewable energy supply chain is changing the sector’s geographic footprint, and more countries are tapping into the socio-economic gains of the energy transition. https://bit.ly/2XFScWF

Researchers at the Paul Scherrer Institute PSI have used the Swiss Light Source SLS to record a molecular energy machine in action and thus to reveal how energy production at cell membranes works. For this purpose they developed a new investigative method that could make the analysis of cellular processes significantly more effective than before. They have now published their results in the journal Science.

Reduce, reuse, recycle.

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