pollution

pollution

pollution

Reactions: Study warns of PFAS contamination in global water systems

A "large fraction" of groundwater samples are contaminated by perfluoroalkyl and polyfluoroalkyl substances (PFASs) and would be considered unacceptable for drinking water, a study claims. The analysis, published by Nature Geoscience, brings together data from 273 studies of surface and groundwater samples from around the world since 2004. The exact proportion of samples exceeding the thresholds varies according to the standards considered. For example, 69% of groundwater samples with no known source of contamination exceed the Canadian threshold, but the figure is only 6% if the EU criterion for the sum of all PFASs is considered.

0

Reaction: Experts call in 'Science' for mandatory standards to ensure ventilation in public buildings

The journal Science publishes an article in which international experts demand mandatory standards to monitor three parameters within public buildings: carbon dioxide (CO2), carbon monoxide (CO), and PM2.5 (fine particles that can enter the lungs and bloodstream), as well as to ensure proper ventilation.

 

 

 

 

0

Reactions: e-waste generated worldwide in 2022 increased by 82% compared to 2010

In 2022, 62 million tonnes of e-waste were generated worldwide, a figure 82% higher than the 34 million tonnes recorded in 2010, according to a United Nations report. The 2022 figure represents an average of 7.8 kilograms per capita per year worldwide, compared to 19.6 kg in Spain. Only 22.3% of this amount of global e-waste was documented as properly collected and recycled, says the Global E-waste Monitor 2024. 

0

Reactions: air pollution decreased in Europe in the last two decades, but increased by ozone in southern regions

Research led by ISGlobal and the Barcelona Supercomputing Center (BSC-CNS) shows that air pollution in 35 European countries - including Spain - has decreased in terms of levels of suspended particulate matter (PM2.5 and PM10) and nitrogen dioxide (NO2). However, ozone (O3) pollution increased in southern Europe, as shown by daily data collected between 2003 and 2019 and published in the journal Nature Communications. The study also looked at the number of days on which limits for two or more pollutants were exceeded simultaneously: despite improvements, 86.3% of the European population experienced at least one day with compound pollution per year. 

0

Plastics in the lumen of the carotid arteries

Research published a few days ago in the New England Journal of Medicine (NEJM) found a considerable and hitherto unknown degree of micro- and nanoplastic contamination in human arteries. It was a bit of a surprise that NEJM accepted the paper, as it usually publishes little on the environmental causes of human disease. The good thing is that the publication makes visible, legitimises, stirs up and will encourage other similar work.
 

1

Reactions: mercury concentration in tuna has not been reduced in the last decades

Mercury concentrations in tuna have remained stable between 1971 and 2022, even though emissions of this metal from human activities have decreased over the same period, a study says. 'Aggressive' emission reduction targets are needed to achieve measurable declines in concentrations of this pollutant, which is toxic for human health, the authors write in the journal Environmental Science & Technology Letters. The Minimata Convention on Mercury, a global treaty that entered into force in 2017, bans new mercury mines and includes provision to reduce mercury use, but mercury has already accumulated in the ocean 'for centuries', the article says.

0

Reactions: Pollution aggravates water scarcity problem

In 2010, nearly 1,000 sub-basins around the world were facing water shortages. But when considering not only water quantity, but also water quality, this figure rises to more than 2,500, according to a study published in Nature Communications. By 2050, the authors estimate that up to a third of sub-basins will face severe shortages of clean water, which could affect 3 billion people. Southern China, Europe, North America and Africa will be the most affected regions.

0

Reactions: the available carbon budget to meet the Paris Agreement goals is smaller than previously thought

The amount of carbon available to emit without surpassing the 1.5°C limit set by the Paris Agreement, commonly referred to as the carbon budget, could be depleted within the next six years, as suggested by a study published in Nature Climate Change. The findings are based on a reevaluation of existing estimates and indicate that carbon budgets might be lower than previously believed.

0

Reactions: exposure to pollution may increase stroke risk also in the short term

Chronic exposure to various air pollutants has been linked to an increased risk of stroke, but the short-term effects have been less well studied. A review of 110 papers and more than 18 million stroke cases shows that recent exposure - in the five days prior to stroke - also increases the likelihood of stroke. The results are published in the journal Neurology.

0