NOTICIAS RECIENTES SOBRE CALIDAD DEL AIRE

Ocean microplastics: First global view shows seasonal changes and sources

An estimated 8 million tons of plastic trash enters the ocean each year, and most of it is battered by sun and waves into microplastics -- tiny flecks that can ride currents hundreds or thousands of miles from their point of entry.

10.Jun.2021


World-first discovery could fuel the new green ammonia economy

Scientists have developed a new technique using phosphonium salts that can help drive the future production of green ammonia. This process could reduce the impact of ammonia production on global carbon emissions. Each metric ton of ammonia produced today contributes to roughly 1.9 metric tons of greenhouse emissions.

10.Jun.2021


Bacteria: Serving tasty solution to global plastic crisis

Scientists have devised a novel way of tackling the mounting issue of plastic pollution -- by using bacteria to transform plastic waste into vanilla flavoring.

10.Jun.2021


Bacteria-sized robots take on microplastics and win by breaking them down

Small pieces of plastic are everywhere, stretching from urban environments to pristine wilderness. Left to their own devices, it can take hundreds of years for them to degrade completely. Catalysts activated by sunlight could speed up the process, but getting these compounds to interact with microplastics is difficult. In a proof-of-concept study, researchers developed self-propelled microrobots that can swim, attach to plastics and break them down.

10.Jun.2021


Soot from heaters and traffic is not just a local problem

Soot particles from oil and wood heating systems as well as road traffic can pollute the air in Europe on a much larger scale than previously assumed. The evaluation of the sources during a measuring campaign in Germany showed that about half of the soot particles came from the surrounding area and the other half from long distances. This underlines the need to further reduce emissions of soot that is harmful to health and climate.

10.Jun.2021


Solutions for fighting pollution in the oceans

Maritime litter is among the most urgent global pollution issues. Marine scientist have published an overview study of solutions for prevention, monitoring, and removal. They found that reducing ocean pollution requires more support, integration, and creative political decisiveness.

10.Jun.2021


Researchers develop tool to aid in development, efficiency of hydrogen-powered cars

Researchers are addressing one aspect of creating fuel cells that can convert hydrogen and oxygen safely into water by developing new computational tools and models needed to better understand and manage the conversion process.

09.Jun.2021


Warmer temperatures lessen COVID-19 spread, but control measures still needed, study finds

New research shows transmission of the virus behind COVID-19 varies seasonally, but warmer conditions are not enough to prevent transmission.

09.Jun.2021


Artificial light harming clownfish

Artificial lighting is killing young clownfish living closest to shore. They also found that these clownfish grew 44% more slowly than clownfish living under natural lighting conditions.

09.Jun.2021


Diverse fossil flora from 400 million year ago

The analysis of very old plant fossils discovered in South Africa and dating from the Lower Devonian period documents the transition from barren continents to the green planet we know today.

08.Jun.2021


Researchers create intelligent electronic microsystems from 'green' material

A research team has created an electronic microsystem that can intelligently respond to information inputs without any external energy input, much like a self-autonomous living organism. The microsystem is constructed from a novel type of electronics that can process ultralow electronic signals and incorporates a device that can generate electricity 'out of thin air' from the ambient environment.

08.Jun.2021


Cleaning up mining pollution in rivers

Mining involves moving a lot of rock, so some mess is expected. However, mining operations can continue to affect ecosystems long after activity has ended. Heavy metals and corrosive substances leach into the environment, preventing wildlife and vegetation from returning to the area.

08.Jun.2021


Conserving coastal seaweed: A must have for migrating sea birds

Ecologists are urging coastal communities to embrace all that the season brings, including the sometimes-unwelcome deposits of brown seaweed that can accumulate on the southern shores.

07.Jun.2021


Carbon dioxide sensors in two urban areas registered big drop in emissions during COVID-19 pandemic

Carbon dioxide emissions in Los Angeles and the Washington DC/Baltimore regions fell roughly 33 percent in April of 2020 compared with previous years, as roads emptied and economic activity slowed due to the COVID-19 pandemic, according to a new study. But while the emissions reductions are significant, the method that scientists used to measure them may have the greater long-term impact.

07.Jun.2021


Fungus creates a fast track for carbon

New research focused on interactions among microbes in water suggests fungal microparasites play a bigger than expected role in aquatic food webs and the global carbon cycle.

04.Jun.2021


Salt marshes trap microplastics in their sediments, creating record of human plastic use

Scientists report that microplastics have been accumulating in salt marshes for decades, creating a historical record of human plastic waste.

04.Jun.2021


Corals tell Arabian Sea story of global warming

Coral insights into 1,000 years of seasonal changes in the Arabian Sea warn of significant impacts caused by global warming.

04.Jun.2021


Ten-fold increase in carbon offset cost predicted

The cost of offsetting corporate carbon emissions needs to increase ten-fold to drive meaningful climate action, says a landmark report.

04.Jun.2021


Arctic sea ice thinning faster than expected

Sea ice thickness is inferred by measuring the height of the ice above the water, and this measurement is distorted by snow weighing the ice floe down. Scientists adjust for this using a map of snow depth in the Arctic that is decades out of date. In the new study, researchers swapped this map for the results of a new computer model designed to estimate snow depth as it varies year to year.

03.Jun.2021


Filter membrane renders viruses harmless

Researchers are developing a new filter membrane that is highly efficient at filtering and inactivating a wide variety of air-borne and water-borne viruses.

03.Jun.2021


Are wind farms slowing each other down?

Many countries promote the expansion of wind farms. However, if these offshore wind farms are set up close to each other, wind energy and hence electricity yield is reduced. A study shows that the losses with increasing offshore wind energy production will be considerable and detectable as large scale pattern of reduced wind speed around wind farms.

03.Jun.2021


Five million years of climate change preserved in one place

An international team of researchers has now succeeded in reconstructing changes in rainfall in Central Asia over the past five million years. The information preserved within the sedimentary succession provides the missing link for understanding land-water feedbacks for global climate.

03.Jun.2021


Major advance in fabrication of low-cost solar cells also locks up greenhouse gases

Engineers have created a means of vastly increasing the speed and efficiency of a key doping process for perovskite solar cells, one that also sequesters CO2.

02.Jun.2021


Acoustic solutions made from natural fibers can reduce buildings' carbon footprints

Good acoustics in the workspace improve work efficiency and productivity, which is one of the reasons why acoustic materials matter. The acoustic insulation market is already expected to hit 15 billion USD by 2022 as construction firms and industry pay more attention to sound environments. Researchers have now studied how these common elements around us could become more eco-friendly, with the help of cellulose fibers.

02.Jun.2021


Less aviation during the global lockdown had a positive impact on the climate, study finds

High levels of aviation drive global warming, not only through greenhouse gas emissions, but also through additional clouds, researchers conclude in a new study.

02.Jun.2021


Plastic waste in the sea mainly drifts near the coast

A study provides new insights into the pollution of the world's oceans with plastic waste. The modelling shows that most of the plastic does not end up in the open ocean, but beaches or drifts in the water near the coast.

02.Jun.2021


Newly identified atmospheric circulation enhances heatwaves and wildfires around the Arctic

Scientists have uncovered a summertime climate pattern in and around the Arctic that could drive co-occurrences of European heatwaves and large-scale wildfires with air pollution over Siberia and subpolar North America.

02.Jun.2021


Researchers learn how swimming ducks balance water pressure in their feathers while diving

A team has discovered the method ducks use to suspend water in their feathers while diving, allowing them to shake it out when surfacing. The discovery opens the door for applications in marine technology.

02.Jun.2021


If countries implement Paris pledges with cuts to aerosols, millions of lives can be saved

Aerosol reductions that would take place as countries meet climate goals could contribute to global cooling and prevent more than one million annual premature deaths over a decade, according to a new study.

01.Jun.2021


How the major Swedish forest fire of 2014 affected the ecosystem

Researchers have spent four years gathering data from the areas affected by the major forest fire of 2014. In their study of how the ecosystem as a whole has been altered, they could see that water quality in watercourses quickly returned to normal, while forested areas continued to lose carbon for many years after the fire.

01.Jun.2021


Is the U. S. understating climate emissions from meat and dairy production?

Methane emissions from North American livestock may be routinely undercounted, a new analysis finds. The work also notes that in developing countries, where animal agriculture is becoming increasingly industrialized, methane emissions could rise more than expected.

01.Jun.2021


Air quality improved during India lockdown, study shows

Research has shown the first COVID-19 lockdown in India led to an improvement in air quality and a reduction in land surface temperature in major urban areas across the country.

01.Jun.2021


Californian smoke drifted as far as Europe in 2020 and caused heavy clouding of sun

The smoke from the extreme forest fires on the US West Coast in September 2020 travelled over many thousands of kilometers to Central Europe, where it continued to affect the atmosphere for days afterwards. A comparison of ground and satellite measurements now shows: The forest fire aerosol disturbed the free troposphere over Leipzig in Germany as never before.

01.Jun.2021


Greenhouse gas emissions from reservoirs higher than previously expected

A new study shows per-area greenhouse gas emissions from the world's water reservoirs are around 29% higher than suggested by previous studies, but that practical measures could be taken to help reduce that impact.

01.Jun.2021


Rare mineral from rocks found in mollusk teeth

Researchers discovered a rare mineral hidden inside the teeth of a chiton, a large mollusk found along rocky coastlines. Before this strange surprise, the iron mineral, called santabarbaraite, only had been documented in rocks.

31.May.2021


Cleaning up water pollution

Researchers have developed a way to repeatedly remove and reuse phosphate from polluted waters. The team's Phosphate Elimination and Recovery Lightweight (PEARL) membrane is a porous, flexible substrate that selectively sequesters up to 99 percent of phosphate ions from polluted water.

31.May.2021


Extreme CO2 greenhouse effect heated up the young Earth

Although sun radiation was relatively low, the temperature on the young Earth was warm. An international team of geoscientists has found important clues that high levels of carbon dioxide in the atmosphere were responsible for these high temperatures. It only got cooler with the beginning of plate tectonics, as the CO2 was gradually captured and stored on the emerging continents.

31.May.2021


The price is right: Modeling economic growth in a zero-emission society

With increasing public awareness of crises associated with degraded environments and mounting pressure to act, governments worldwide have begun to examine environmentally sustainable policies. However, there are many questions about whether enacting these policies will negatively affect economic growth. Now, a model suggests that sustained GDP growth is possible even after spending to clean up pollution as it is created, providing hope that a zero-emission society is an achievable goal.

31.May.2021


Natural gas pipeline density higher overall in more vulnerable US counties

An analysis found counties with more socially vulnerable populations had a higher density of natural gas pipelines overall.

28.May.2021


Scientists develop transparent electrode that boosts solar cell efficiency

Developing new ultrathin metal electrodes has allowed researchers to create semitransparent perovskite solar cells that are highly efficient and can be coupled with traditional silicon cells to greatly boost the performance of both devices, said an international team of scientists. The research represents a step toward developing completely transparent solar cells.

28.May.2021


Plastic in Galapagos seawater, beaches and animals

Plastic pollution has been found in seawater, on beaches and inside marine animals at the Galapagos Islands.

28.May.2021


Managing global climate change -- and local conditions -- key to coral reefs' survival

According to a new study, what's key to coral reefs surviving climate-driven heatwaves and subsequent bleaching is managing global climate change -- and local conditions.

27.May.2021


Banning the sale of fossil-fuel cars benefits the climate when replaced by electric cars

If a ban were introduced on the sale of new petrol and diesel cars, and they were replaced by electric cars, the result would be a great reduction in carbon dioxide emissions. That is the finding of new research, looking at emissions from the entire life cycle - from manufacture of electric cars and batteries, to electricity used for operation.

27.May.2021


People prefer 'natural' strategies to reduce atmospheric carbon

A cross-disciplinary collaboration found that a majority of the U.S. public is supportive of soil carbon storage as a climate change mitigation strategy, particularly when that and similar approaches are seen as 'natural' strategies.

26.May.2021


Scientists find solution to measure harmful plastic particles in human sewage

Scientists have got up close and personal with human sewage to determine how best to measure hidden and potentially dangerous plastics.

26.May.2021


Stormwater could be a large source of microplastics and rubber fragments to waterways

In cities, heavy rains wash away the gunk collecting on sidewalks and roads, picking up all kinds of debris. However, the amount of microplastic pollution swept away by this runoff is currently unknown. Now, researchers report that stormwater can be a large source of microplastics and rubber fragments to water bodies and, with a proof-of-concept experiment, show that a rain garden could keep these microscopic pieces out of a storm drain.

26.May.2021


Warm ice may fracture differently than cold ice

Researchers have found strong evidence that warm ice - that is, ice very close in temperature to zero degrees Celsius - may fracture differently than the kinds of ice typically studied in laboratories or nature. A new study takes a closer look at the phenomenon.

26.May.2021


Record-shattering 2020 trans-Atlantic dust storm

Researchers parsing the mechanism that in June 2020 transported a massive dust plume from Saharan Africa to the Caribbean and U.S. Gulf Coast.

26.May.2021


Understanding of invisible but mighty particles in Earth's radiation belts

Tiny charged electrons and protons which can damage satellites and alter the ozone have revealed some of their mysteries to scientists.

26.May.2021


Technique to evaluate wind turbines may boost wind power production

With a global impetus toward utilizing more renewable energy sources, wind presents a promising, increasingly tapped resource. Despite the many technological advancements made in upgrading wind-powered systems, a systematic and reliable way to assess competing technologies has been a challenge. Researchers have used advanced data science methods and ideas from the social sciences to compare the performance of different wind turbine designs.

25.May.2021