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210 notícias encontradas para "carbon"
Trees keep absorbing carbon long after they stop growing
Trees keep absorbing carbon long after they stop growing
Oak trees keep absorbing carbon dioxide long after their annual growth has ended, revealing that photosynthesis and wood production are not as closely linked as scientists once believed. The finding could reshape forecasts of how much carbon forests will be able to store in a war
Hidden deep-sea turbulence could alter climate and fisheries within one lifetime
Hidden deep-sea turbulence could alter climate and fisheries within one lifetime
Tiny, invisible swirls and twirls—not much bigger than a coin—deep below the ocean's surface are silently shaping some of the biggest forces shaping our climate: sea level rise, fisheries collapse, extreme flooding and how much carbon dioxide the ocean absorbs.
Falling water levels trigger a surge in methane emissions from Mediterranean reservoirs
Continental aquatic ecosystems, such as lakes and reservoirs, occupy a small proportion of Earth's surface but play a significant role in the global carbon cycle. It is estimated that more than 40% of global methane emissions originate from these ecosystems. However, the true sca
Stress protection of Amazon trees, induced by climate warming, may alter atmosphere chemis
The Amazon rainforest is one of the largest carbon reservoirs on Earth. It is also the world's largest source of biogenic volatile organic compounds (VOCs). These carbon-based gases are naturally released by vegetation. They protect trees against various sources of stress, e.g.,
Neutron imaging reveals how water limits CO₂ storage in recycled concrete
The construction sector faces two problems at once: it emits large amounts of CO₂ and produces vast quantities of concrete waste. But what if part of that waste could be used to trap carbon instead of ending up as rubble?
Carbon–bismuth bonds reveal that relativity blurs the textbook line between sigma and pi b
Carbon–bismuth bonds reveal that relativity blurs the textbook line between sigma and pi b
Brown University chemists have provided direct evidence that upends the textbook explanation of how triple chemical bonds work in heavy elements. In a study published in Science, the researchers show evidence that when atomic nuclei are sufficiently heavy, the principles describe
New ligand engineering strategy creates more active nanocluster catalysts
A joint research group from Tohoku University, Tokyo University of Science, Tokyo Metropolitan University and the Japan Fine Ceramics Center has developed a thermal catalyst that exhibits high carbon monoxide (CO) oxidation activity under low-temperature conditions.
Tropical forests can switch from carbon sinks to carbon sources during El Niño
Tropical forests draw down and store large quantities of CO₂ from the atmosphere. The Amazon rainforest in South America, for example, stores approximately 123 billion tons of carbon—more than is stored in any other terrestrial ecosystem in the world. But these forests are facing
Death trap: what to do about the everyday items catching and killing Australian wildlife
Thousands of native animals get caught in back yard fruit nets, fences and fishing line every year. Here’s what you can do to helpChange by degrees offers life hacks and sustainable living tips each Saturday to help reduce your household’s carbon footprintGot a question or tip fo
Deep-sea life has a secret food source scientists never expected
Deep-sea life has a secret food source scientists never expected
Scientists discovered that extreme deep-sea pressure squeezes valuable nutrients out of sinking organic particles, providing an unexpected food source for ocean microbes. The finding could rewrite our understanding of both deep-ocean ecosystems and how carbon is stored on Earth.
‘Huge wave’ of carbon storage projects causes alarm in small-town USA as oil firms eye bil
‘Huge wave’ of carbon storage projects causes alarm in small-town USA as oil firms eye bil
Dozens of projects are in development across US despite concerns over environmental and health risksThe plan to bury carbon under remote Indiana farmland is supposed to be a slam dunk for the climate, according to its supporters – all generously funded by US tax dollars.But as fa
Machine learning calibration of biosensors for microcystin toxin monitoring in freshwater
Machine learning calibration of biosensors for microcystin toxin monitoring in freshwater
Portable screen-printed carbon electrode (SPCE) biosensors offer a rapid, low-cost way to detect microcystin-lysine-arginine (MC-LR), an extremely potent toxin produced by cyanobacteria during harmful algal blooms in freshwater. Even at low concentrations, MC-LR can damage the li