The Massachusetts Institute of Technology (MIT) has released its “2025 Global Change Outlook,” highlighting concerns about climate thresholds being surpassed under existing policies despite the swift growth of renewable energy. The forecast comes amid stalled international climate efforts and the U.S.’s retreat from key climate agreements, projecting continued emissions growth and dangerous warming levels by century’s end.
The forecast uses MIT’s Integrated Global Systems Model, analyzing factors like population growth, economic activity, and energy use. Sergey Paltsev, co-author and deputy director of MIT’s Center for Sustainability Science and Strategy, emphasized the misalignment with Paris Agreement goals.
Renewable energy, particularly wind and solar, is projected to provide over 70% of global electricity by 2050, up from 40% today. Despite this, emissions from economic and population growth, notably in developing countries, are expected to rise until 2030. Developed nations, including China and India, see stagnant emissions, driven by liquid fuels and natural gas. Emissions might decline slightly between 2030 and 2050 but are likely to climb again, partly due to agricultural emissions.
MIT’s model suggests global temperatures could surpass 1.5 degrees Celsius soon, hitting 1.8 degrees by 2050 and nearing 3 degrees by 2100. These outcomes align with other studies, like those from Rhodium Group and Climate Action Tracker, which predict similar warming patterns.
The Paris Agreement aims to limit warming to 1.5 degrees, with greater regional extremes posing severe risks. Recent data from the European Union’s Copernicus Climate Change Service indicates 2025 as the third warmest year recorded, with the past three years averaging over 1.5 degrees above pre-industrial levels. Adam Schlosser, another co-author, points to increased global energy uptake leading to more frequent extreme weather events.
Higher global temperatures are expected to exacerbate extreme weather, disrupt agriculture, and accelerate biodiversity loss. However, the report also outlines scenarios where strong policy commitments could reduce warming. Bill Hare of Climate Analytics highlights that achieving renewable energy and efficiency targets by 2035 could significantly slow warming.
Paltsev notes that limiting warming requires substantial investments and coordinated efforts. Even optimistic scenarios indicate temperatures will likely exceed 1.5 degrees by 2050. Schlosser cautions about potential overshoots in warming, but stresses ongoing efforts can limit impacts.
“Every degree matters,” Paltsev asserts, emphasizing the importance of continued action to mitigate climate change’s impact on lives and ecosystems.
Original Story at insideclimatenews.org