A team was able to reduce CO2 exhaust of a diesel-powered engine by 86% by replacing 90% of the fuel by hydrogen in a hybrid dual-fuel engine. It looks promising for applications not suitable for other energy sources
The birds died because of a specific algae that lives on a specific invasive water plant and makes a novel toxin, but only in the presence of specific pollutants. Everything had to go right—or wrong, really—for the mass deaths to happen. This complex chain of events reflects just how much humans have altered the natural landscape and in how many ways
However, this new policy isn't a global one—it doesn't apply to the US. That's because here, the automaker expects continuing demand for internal combustion engines, particularly in pickup trucks
« une réduction des émissions d’oxydes d’azote de moitié permettrait d’améliorer les rendements d’environ 25 % pour les cultures d’hiver en Chine, de près de 10 % pour les cultures d’hiver et d’été en Europe occidentale »
« As levels of carbon dioxide rose from 550 ppm to 945 ppm to 1400 ppm, subjects’ scores under most headings declined substantially. (Problem-solving ability also seemed to suffer as levels of volatile organic compounds rose.) »
« A recent study describes how researchers used the ESA's Sentinel 5-P satellite to carry out a global survey of unusually large methane plumes, finding 1,800 “ultra-emitters” during the time frame of 2019 to 2020 »
« They calculate that molecules released from asphalt could lead to between 1000 and 2500 tons of particulate air pollution—compared with just 900 to 1400 tons from gasoline and diesel vehicles »
Au delà de la question de la réduction du trafic aérien, qui se pose légitimement, intéressant de voir les impacts de l'utilisation de carburants alternatifs. Dommage que le côté financier semble manifestement limitant/bloquant pour certaines compagnies.
« En France, selon leurs calculs, près de 100 000 décès prématurés (97 242) seraient attribués chaque année à la pollution de l’air extérieur liée aux énergies fossiles. Soit 17,3 % de l’ensemble des décès »
Peut-on espérer des pouvoirs publics la prise de mesures plus importantes en ayant maintenant conscience de l'impact financier de la pollution de l'air ?
« New York City will close 40 miles (64 kilometers) of streets to cars next month to provide more opportunity for recreation and expand space for pedestrians to keep social distance »