Lifeboat Foundation

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It may seem off-putting to some, but human waste is full of nutrients that can be recycled into valuable products that could promote agricultural sustainability and better economic independence for some developing countries.

Cities produce and must manage huge quantities of wastewater. Researchers at the University of Illinois at Urbana-Champaign have developed a model to clarify what parts of the world may benefit most from re-circulation of human-waste-derived nitrogen, potassium and phosphorus from cities and back into farm fields. They report their findings in the journal Nature Sustainability.

“We grow our crops in the field, apply nutrient-rich fertilizers, eat the crops, excrete all of the nitrogen, phosphorus and potassium and then those nutrients end up at the wastewater treatment plant,” said Jeremy Guest, a civil and environmental engineering professor and study co-author. “It is a very linear, one-directional flow of resources. Engineering a more circular nutrient cycle would create opportunities that could benefit the environment, economy and agriculture.”

Continue reading “Human wastewater valuable to global agriculture, economics, study finds” »

A team of researchers from the Chinese Academy of Sciences, the Academy of Agriculture and Forestry Sciences in China and the University of Oxford in the U.K. has found a way to grow green revolution crops using less nitrogen with no reduction in yield. In their paper published in the journal Nature, the group describes their research efforts and the results they found when planting newly developed plant varieties. Fanmiao Wang and Makoto Matsuoka with Nagoya University offer a News & Views piece on the work done by the team in the same journal issue.

The green revolution was characterized by big increases in crop production in developing countries—it came about due to the increased use of pesticides, fertilizers and changes in crop varieties used. One of the changes to the crops came about as rice and wheat plants were bred to grow less tall to prevent damage from wind and rain. While this resulted in improved yields, it also resulted in the use of more nitrogen-based fertilizers, which are environmentally harmful. In this new effort, the researchers wondered if it might be possible to re-engineer green-revolution crop varieties in such a way as to restrict height and therefore retain high productivity, while also using nitrogen more efficiently.

Prior research had shown that proteins in the DELLA family reduced plant growth. Crop breeding in the 1960s led to varieties of rice and wheat with genetic mutations that allowed the proteins to build up in the plants, thus stunting their growth. Unfortunately, DELLA proteins have also been found to be the cause of inefficient nitrogen use in the same plants—as a result, farmers used more of it to increase yields. To overcome this problem, the researchers crossbred varieties of rice to learn more, and found that the transcription factor OsGRF4 was associated with nitrogen uptake. Using that information, they engineered some varieties of rice to express OsGRF4 at higher levels, which, when tested, showed higher uptake of nitrogen. The team then planted the varieties they had engineered and found that they required less nitrogen to produce the same yields—and they were just as stunted. They therefore claim that it is possible to grow green-revolution crops that require less nitrogen.

Continue reading “A way to get green revolution crops to be productive without needing so much nitrogen” »

What happens when a nation built on the concept of individual property ownership starts to give that up?

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TOKYO — Imagine electric cars that can travel 700km to 800km on a single charge, twice as far as they do today. Imagine batteries that are smaller, safer and pack more punch than the lithium-ion cells that power our gadgets now.

Such is the promise of solid-state batteries. Capable of holding more electricity and recharging more quickly than their lithium-ion counterparts, they could do to lithium-ion power cells what transistors did to vacuum tubes: render them obsolete.

As their name implies, solid-state batteries use solid rather than liquid materials as an electrolyte. That is the stuff through which ions pass as they move between the poles of a battery as it is charged and discharged. Because they do not leak or give off flammable vapor, as lithium-ion batteries are prone to, solid-state batteries are safer. They are also more energy-dense and thus more compact.

Continue reading “In race for better batteries, Japan hopes to extend its lead” »

The US Congress wants the Missile Defense Agency (MDA) to rapidly develop and demonstrate a boost-phase ICBM (and hypersonic weapon) intercept capability as soon as practicable.

Space-based laser weapons technology is one of the options.

Officials have dragged their feet on updating machines and securing data – and a climate of fear could undermine voter confidence.

A study from Associated Press suggests that users are still tracked even if they turn off location history.