LONDON (Reuters) – Investors managing around $20 trillion in assets on Tuesday called on the heaviest corporate emitters of greenhouse gases to set science-based targets on the way to net zero carbon emissions by mid-century.
AXA Group and Nikko Asset Management Co are among 137 investors urging 1,800 companies responsible for a quarter of global emissions to act, coordinated by non-profit group CDP.
While more companies are pledging their support for the 2015 Paris agreement on climate change, aiming to be carbon neutral by 2050, not all have been clear about how they will get there.
To help limit global warming to no more than 1.5 degrees Celsius above pre-industrial norms by 2050, companies
Geoscientists at the University of Sydney have discovered a natural laboratory to test claims that the carbon captured during the erosion and weathering of common rocks could be a viable mitigation strategy against global warming.
That laboratory is the Tweed River valley in north-eastern New South Wales.
“When common rocks, known as olivine, chemically break down, they absorb carbon dioxide to form carbonates that can then be washed into the oceans,” said lead author of the study, Kyle Manley, a student at the University of Irvine in California, who started the research while studying at Sydney.
“In that way, river valleys like the Tweed can act as carbon sinks.”
The carbonates formed in this process later become the shells of marine animals and corals. Over millions of years, these remnants can form
As climate warming stokes longer fire seasons and more severe fires in the North American boreal forest, being able to calculate how much carbon each fire burns grows more urgent. New research led by Northern Arizona University and published this week in Nature Climate Change suggests that how much carbon burns depends more on available fuels than on fire weather such as drought conditions, temperature, or rain. In a large retrospective study that stretched across Canada and Alaska, the international team of researchers found that the carbon stored belowground in soil organic matter was the most important predictor of how
The deep sea is far away and hard to envision. If imagined it seems like a cold and hostile place. However, this remote habitat is directly connected to our lives, as it forms an important part of the global carbon cycle. Also, the deep seafloor is, in many places, covered with polymetallic nodules and crusts that arouse economic interest. There is a lack of clear standards to regulate their mining and set binding thresholds for the impact on the organisms living in affected areas.
Mining can reduce microbial carbon cycling, while animals are less affected
An international team of scientists around Tanja Stratmann from the Max Planck Institute for Marine Microbiology in Bremen, Germany, and Utrecht University, the Netherlands, and Daniëlle de Jonge from Heriot-Watt University in Edinburgh, Scotland, has investigated the food web of the deep seafloor to see how it is affected by disturbances such as those caused
Promising new technology using leftover forestry wood to extract clean carbon dioxide is expected to benefit commercial greenhouses growers and the environment.
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The Kiwi invention uses leftover forestry wood to extract clean carbon dioxide, helping increase crop yield and reduce emissions at the same time.
Source: 1 NEWS
The Kiwi invention would help increase crop yield and reduce emissions at the same time.
New Zealand Gourmet’s Roelf Schreuder said the produce wholesaler is currently getting CO2 for their Taupo crops from Taranaki as a waste product, which is brought in through trucks every week and “can be a hassle”.
Now, Hot Lime Labs has developed a way of producing clean CO2 on site. The technology uses wood chips warms the plants at night while producing carbon dioxide, which is soaked up by limestone pellets, which acts as a “CO2 sponge,” founder and CEO
Researchers probing peatlands to discover clues about past environments and carbon stocks on land have identified peatland that is twice as old and much deeper than previously thought.
Their findings, detailed in an open-access paper published Sept. 14 in the journal Environmental Research Letters, show that an inland site near Putussibau, not far from the Indonesia-Malaysia border, formed at least 47,800 years old and contains peat 18 meters deep — roughly the height of a six-story building.
The study provides new insights about the climate of equatorial rainforests, especially during the last ice age, said study co-author Dan Gavin, a professor of geography at the University of Oregon.
“This existence of this very deep and old peatland provides some clues on past climate,” Gavin said. “It tells us that this area remained sufficiently wet and warm to support peat growth through the last ice age. The climate during that
A new study shows New Zealand sheep and beef farms are already offsetting the bulk of their agricultural emissions.
The research – led by Dr Bradley Case at Auckland University of Technology (AUT) – estimates the woody vegetation on sheep and beef farms across the country is offsetting between 63 percent and 118 percent of on-farm agricultural emissions.
If the mid-point of that range is taken, on average around 90 percent of emissions are being absorbed.
Dr Case, who is a senior lecturer in GIS and remote sensing at AUT’s Applied Ecology Department in the School of Science, said the findings showed there was a strong case for farmers to get credit for the sequestration
Zeolites are porous minerals that occur both naturally but also are being synthesized artificially. Because they are stable and durable, zeolites are used for chemical catalysis, purification of gases and liquids, and even in medical applications such as drug delivery and blood-clotting powders, e.g. the QuickClot trauma bandages used in the US military.
Zeolites used in gas separation are usually produced as membranes. The state-of-the-art zeolitic membranes are manufactured by a lengthy and complex crystallization process. Unfortunately, this method has proved difficult to reproduce. Also, it lacks in producing efficient gas-separation membranes, especially when it comes to the separation of hydrogen and carbon dioxide, which is necessary for pre-combustion carbon capture from power plants.
A team of chemical engineers led by Kumar Agrawal at EPFL Valais Wallis have now successfully simplified the chemistry behind zeolite membrane synthesis, making it simple, reproducible, and scalable. The achievement of the longstanding goal is
When it comes to climate change, relationships are everything. That’s a key takeaway of a new UO study that examines the interaction between plants, atmospheric carbon dioxide and rising water levels in the Mississippi River.
Published recently in the Geological Society of America’s journal GSA Today, the study compared historical atmospheric carbon data against observations of herbarium leaf specimens to quantify the relationship between rising carbon levels and increasingly catastrophic floods in the American Midwest.
Using data covering more than two centuries, researchers demonstrated that as carbon levels in the atmosphere have risen due to the burning of fossil fuels, the ability of plants to absorb water from the air has decreased. That means more rainfall makes its way into rivers and streams, adding to their potential for damaging floods.
Co-authored by UO Museum of Natural and Cultural History geologist Greg Retallack and earth sciences
An international team of researchers has found that carbon sequestering losses in the Amazon basin have been undermeasured due to omission of data representing losses at the edges of forests. In their paper published in the journal Science Advances, the group describes using lidar to estimate the carbon sequestering abilities of trees along the edges of Amazon forests.
Prior research has shown that when part of a forest in the Amazon basin is cut down, the trees that remain at the edges of the forest are not as robust as those that are situated farther in. This is because they are more exposed to pollution, pesticides, herbicides, etc. In this new effort, the researchers noticed that the reduced sequestering abilities of such trees are not included in studies of carbon sequestering losses in