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Solar energy is clean and abundant. But when the sun isn’t shining, you must store the energy in batteries or through a process called photocatalysis—in which solar energy is used to make fuels. In photocatalytic water splitting, sunlight separates water into hydrogen and oxygen. The hydrogen and oxygen can then be recombined in a fuel cell to release energy.

Now, a new class of materials—halide double perovskites—may have just the right properties to split water, according to a newly published paper in Applied Physics Letters.

“If we can come up with a material that can be useful as a water-splitting photocatalyst, then it would be an enormous breakthrough,” said Feliciano Giustino, a co-author on the paper.

Continue reading “Promising new material has the right properties to capture solar energy, split water into hydrogen and oxygen” »

RIPPA, a fully autonomous robot, can cover five acres a day on a solar charge — finding and exterminating pests and weeds on every single plant over the equivalent of four football fields. Are robots like RIPPA the future of farming?

RIPPA stands for “Robot for Intelligent Perception and Precision Application”.

Continue reading “RIPPA The Farm Robot Exterminates Pests And Weeds” »

She retired from NASA on Friday after blazing a trail for countless female astronauts.

NASA astronaut Peggy Whitson, the 58-year-old from Iowa farm country who spent a record-breaking 665 days in space, retired from the space agency on Friday.

“I have hit my radiation limit,” Whitson told Business Insider during a recent interview. “So not going into space with NASA anymore.”

Continue reading “The incredible career of NASA’s Peggy Whitson, who applied to become an astronaut 10 times before she broke the American record for space travel” »

Too bad the middle class is shrinking!

The rate of growth in residential rooftop solar photovoltaics (PV) in Australia since 2008 has been nothing short of breathtaking.

Our new research suggests that the households most likely to join in the solar spree are those that are affluent enough to afford the upfront investment, but not so wealthy that they don’t worry about their future power bills.

Continue reading “Are solar panels a middle-class purchase? This survey says yes” »

Americans installed 2.5 gigawatts of solar panels in the first quarter of the year—a 13 percent increase from a year earlier, according to a report by the Solar Energy Industries Association. That made solar the leading source of new energy generation at 55 percent, dominating over wind and natural gas turbines. This was in spite of the fact that President Donald Trump imposed tariffs earlier this year on imported panels and their parts, reported Bloomberg News. Total installations are on track to reach 10.8 gigawatts at the end of the year, with installations reaching more than 14 gigawatts by 2023.

Read it at Bloomberg.

As technology changes the way people live and work, cities are undergoing an unprecedented transformation. Those that have the infrastructure and strategy to manage this rapid technological shift are set to become the most competitive.

Globally, city economies in India, Vietnam and China have the strongest short-term momentum. The pace and scale of change in these markets is extraordinary, as they build out their skylines and infrastructure platforms to meet booming demand. While these changes present opportunities, many of these cities are facing challenges to their longer-term development prospects, with strains on infrastructure, high levels of inequality, issues around affordability, and environmental degradation.

Such rapid transformation is often eye-catching. But it is cities that are investing in a sustainable future, and laying the groundwork for ongoing success, that deserve recognition. These cities are “future-proofing” to ensure positive, long-term momentum. Key elements of future-proofing include: the ability to drive and manage technological change; infrastructure that contributes to a high quality of life; a long-term city vision; and attracting and retaining talent.

Continue reading “These are the world’s most future-proof cities” »

Scientists from Universidad Carlos III de Madrid (UC3M) have designed a new control system for wind turbines in offshore wind farms that allows power transmission to the coast in a more flexible and cheaper way than current solutions.

This innovation allows the use of a diode rectifier station in the offshore platform of a high voltage direct current (HVDC) link. In this way, the wind turbine’s alternating current (AC) can be easily converted into direct current (DC) for HVDC transmission.

Continue reading “A new system optimises electric transmission from offshore wind farms” »

Last October, a University of California, Berkeley, team headed down to the Arizona desert, plopped their newest prototype water harvester into the backyard of a tract home and started sucking water out of the air without any power other than sunlight.

The successful field test of their larger, next-generation harvester proved what the team had predicted earlier in 2017: that the water harvester can extract drinkable water every day/night cycle at very low humidity and at low cost, making it ideal for people living in arid, water-starved areas of the world.

“There is nothing like this,” said Omar Yaghi, who invented the technology underlying the harvester. “It operates at ambient temperature with ambient sunlight, and with no additional energy input you can collect water in the desert. This laboratory-to-desert journey allowed us to really turn water harvesting from an interesting phenomenon into a science.”

Continue reading “In desert trials, next-generation water harvester delivers fresh water from air” »