Jean-Pascal Van Ypersele

Les géants américains des semi-conducteurs Nvidia et Advanced Micro Devices ont accepté de verser au gouvernement américain 15 % de leurs revenus provenant de la vente de puces IA à la Chine, selon des informations parues dimanche dans les médias. Cet accord pourrait rapporter plus de 2 milliards de dollars au gouvernement américain.

Evidence shows a continuing increase in the frequency and severity of global heatwaves1,2, raising concerns about the future impacts of climate change and the associated socioeconomic costs3,4. Here we develop a disaster footprint analytical framework by integrating climate, epidemiological and hybrid input–output and computable general equilibrium global trade models to estimate the midcentury socioeconomic impacts of heat stress. We consider health costs related to heat exposure, the value of heat-induced labour productivity loss and indirect losses due to economic disruptions cascading through supply chains. Here we show that the global annual incremental gross domestic product loss increases exponentially from 0.03 ± 0.01 (SSP 245)–0.05 ± 0.03 (SSP 585) percentage points during 2030–2040 to 0.05 ± 0.01–0.15 ± 0.04 percentage points during 2050–2060. By 2060, the expected global economic losses reach a total of 0.6–4.6% with losses attributed to health loss (37–45%), labour productivity loss (18–37%) and i

As world leaders assemble for the United Nations climate change conference (COP27) in Egypt, it’s hard to be optimistic the talks will generate any radical departure from the inexorable rise in global carbon emissions over the past two centuries.