Scientific news in small doses

A few milligrams of all the scientific news of the week

Posted yesterday at 8am

Eric Pierre champagne

Eric Pierre champagne
The press

Russian gas, the most polluting

The world’s dirtiest oil and gas fields are in Russia, Turkmenistan and Texas. At least that is the observation of an American NGO, the Rocky Mountain Institute, which has just published a report on the most climate-damaging fossil fuel extraction sites. In Russia we find the production that emits the most greenhouse gases, more precisely at the Astrakhanskoye site, south-east of Moscow, near the Caspian Sea, where we produce natural gas. It releases the equivalent of 1 kg of CO2 per barrel produced. Oil sites in Turkmenistan (just under 1 kg) and Texas (908 g) come in 2nde and 3e Position.

quiz

Is climate change always responsible for heat waves?


PHOTO PASCAL ROSSIGNOL, REUTERS

Wheat field affected by drought in Blécourt, France

According to researchers at Imperial College London, there is no longer any doubt that climate change affects everyone. This is the main conclusion of a study published in the journal Environmental research: climate. In an interview with the science journal New scientist, the study’s lead author Friederike Otto said that “climate change is really a game changer when it comes to heat waves.” However, scientists caution that studies are still needed to accurately estimate the impact of climate change on any given heat wave.

The number

3 billion


PHOTO STEFANI REYNOLDS, AGENCE FRANCE-PRESSE

Tomatoes at a grocery store in Washington

According to a study published in the journal health food, the carbon footprint of transporting food on a planetary scale is in the order of 3 billion tonnes of greenhouse gases (GHG), a balance at least 3.5 times higher than previous estimates. It should be noted that the richest countries, which account for 12.5% ​​of the world’s population, are responsible for half (52%) of these emissions.

Water reservoirs at worrying levels


PHOTO RICH PEDRONCELLI, ASSOCIATED PRESS

Lake Oroville, the second largest reservoir in California, was at 55% capacity a month ago.

California’s two main water reservoirs are currently at extremely low levels, worrying authorities in the most populous state in the United States. The largest reservoir, Lake Shasta, was only 40% full a month ago, while Lake Oroville, the second largest reservoir, was 55% full. Experts fear the worst as the hottest summer months approach. Millions of Californians are already subject to severe restrictions on drinking water use. The drought that has been ravaging the American West for several years is the worst on record in 1,200 years, a study also revealed last February.

finance and biodiversity


PHOTO CLODAGH KILCOYNE, REUTERS ARCHIVE

Extinction Rebellion members demonstrate June 8 during a biodiversity conference in Dublin, Ireland.

Biodiversity loss could negatively impact public finances in several countries, researchers at the University of Cambridge in the UK believe. According to their study, a “partial ecosystem collapse” from fishing, tropical timber production and wild pollination would increase the annual cost of borrowing for 26 countries, including the United States, by $53 billion. China, for example, could downgrade its credit rating by six notches and increase its interest payments by $18 billion each year. The research team used World Bank data to estimate the financial consequences of partial ecosystem loss for each of the nations. Costs that add to the already astronomical costs required to address the climate crisis.

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