Highly efficient, light-emitting diodes (LEDs) could slash the world's electricity consumption. They are already sold in stores, but more widespread adoption of the technology has been hindered by high costs due to limited availability of raw materials and difficulties in achieving acceptable light quality. But researchers report today that they have overcome these obstacles and have developed a less expensive, more sustainable white LED.
Engineers have developed a novel technique to predict when bearings inside wind turbines will fail which could make wind energy cheaper. The method uses ultrasonic waves to measure the load transmitted through a ball bearing in a wind turbine.
Cleaning up municipal and industrial wastewater can be dirty business, but engineers have developed an innovative wastewater treatment process that not only mitigates carbon dioxide emissions, but actively captures greenhouse gases as well.
Greenhouse-gas emissions from human activities do not only cause rapid warming of the seas, but also ocean acidification at an unprecedented rate. Artificial carbon dioxide removal from the atmosphere has been proposed to reduce both risks to marine life. A new study based on computer calculations now shows that this strategy would not work if applied too late.
Solar-Active-Houses heat themselves using heat collectors and water tanks. However, no one had conducted an objective assessment of how efficiently they do so. Researchers put some of these solar houses to the test, identified where there was room for improvement and laid the scientific groundwork for this housing concept.
EU's grid connected cumulative capacity in 2014 reached 129 GW, meeting 8% of European electricity demand, equivalent to the combined annual consumption of Belgium, the Netherlands, Greece and Ireland.
Transferring power from Africa to Europe via a high voltage direct current (HVDC) transmission line could be a sustainable business model with added value for both regions. This is the conclusion reached by researchers in the EU-sponsored BETTER project.
A metal-free alternative catalyst for fuel cells may be at hand. A team of chemists introduces a new approach that uses a molecular catalyst system instead of solid catalysts. Although molecular catalysts have been explored before, earlier examples were much less efficient than the traditional platinum catalyst.