Carbon Intensity
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Compact 15-minute cities exhibit lower carbon intensity in urban transport
arXiv:2409.01817v3 Announce Type: replace Abstract: The 15-minute city concept, which advocates cities where essential services are accessible within a 15-minute walk or bike ride, has gained significant attention in recent years. However, despite being celebrated for promoting sustainability, large-scale empirical evaluations of the effectiveness of the 15-minute concept in reducing emissions remain limited. To address this gap, we investigate whether cities with better walking...
Heterogeneous Effects of Green Finance on Urban Decarbonization: Evidence from 285 Cities in China
arXiv:2606.06986v1 Announce Type: new Abstract: While green finance has become a key instrument for low-carbon city transitions, its actual decarbonization effects and transmission mechanisms remain unclear. This study employs econometric models and machine learning-based analysis to examine whether and how green finance reduces city-level carbon intensity. Results show that green finance significantly lowers carbon intensity, with green bonds and green investment having the strongest...
Assessing the Carbon Emissions and Energy Consumption of U.S. Hyperscale Data Centers
arXiv:2606.05420v1 Announce Type: new Abstract: The rapid proliferation of hyperscale data centers (HDCs) in the US, mainly driven by the adoption of artificial intelligence, has raised concerns about this industry's environmental footprint. We compiled facility-level information on 403 US hyperscale data centers operating between May 2024 and April 2025 and estimated their electricity consumption, electricity sources, and attributable CO2 emissions.
How autonomous machines are transforming road and tunnel safety
As Europe embarks on massive underground infrastructure projects, a new technological ecosystem is being tested to eliminate human risk and cut carbon emissions in one of the world's most energy-intensive sectors. Autonomous heavy machinery and drones are joining forces to cut emissions and enhance safety in tunnel construction, thanks to a Spanish-led EU initiative. With the construction industry responsible for nearly 40% of global energy-related CO2 emissions, the carbon footprint of the...
CarbonSim: A Lifecycle-Aware Framework for Evaluating Carbon Tradeoffs in Hardware Upgrade Decisions
Announce Type: new Abstract: As the demand for information and communication technologies (ICT) continues to rise, the environmental impact of computing systems is becoming an increasingly critical concern. Although newer hardware often improves performance and energy efficiency, these gains do not always offset the carbon cost of premature replacement, particularly under low-utilization workloads or low-carbon electricity grids. We present CarbonSim, a lifecycle-aware simulation framework...
Light-induced quantum friction of carbon nanotubes in water
Abstract Friction slows down moving objects at both macroscopic and microscopic scales1. At the electronic level, quantum friction describes direct transfer of momentum between a liquid and the electrons of a solid2. Owing to its microscopic nature, this phenomenon remains experimentally challenging to capture3.
Climate cost of expanded World Cup under scrutiny as emissions set to soar
Climate cost of expanded World Cup under scrutiny as emissions set to soar MANCHESTER: The World Cup kicks off on Thursday (Jun 11) as a celebration of goals, drama and global fandom, but it is also expected to carry a climate cost more than double that of Qatar 2022, throwing a harsh spotlight on the environmental price of football's expanding showpiece. The tournament's enlarged footprint will see 48 teams and venues scattered across North America and an assessment published last week by...
Climate cost of expanded World Cup under scrutiny as emissions set to soar
Climate cost of expanded World Cup under scrutiny as emissions set to soar MANCHESTER, England, June 9 : The World Cup kicks off on Thursday as a celebration of goals, drama and global fandom, but it is also expected to carry a climate cost more than double that of Qatar 2022, throwing a harsh spotlight on the environmental price of football's expanding showpiece. The tournament's enlarged footprint will see 48 teams and venues scattered across North America and an assessment published last...
The push to standardize ESG scores could make corporate greenwashing easier, not harder
The push to standardize ESG scores could make corporate greenwashing easier, not harder Lisa Lock Scientific Editor Andrew Zinin Lead Editor Three-quarters of S&P 500 companies now tie a portion of their CEO's pay to environmental, social and governance (ESG) metrics. They typically include carbon emissions, workforce diversity and worker safety, among others. The justification is straightforward: if shareholders want corporations to take climate change and social responsibility seriously,...
Poland criticizes ‘insane’ EU climate policy
The speed at which the EU is pushing its industry to cut carbon emissions under the Emissions Trading System is “insane,” according to Poland’s deputy climate and environment minister. Speaking at the POLITICO Energy & Climate Forum in Brussels Monday, Secretary of State Krzysztof Bolesta said the EU was moving too fast to take away free pollution permits for heavy industry — in some cases reducing them by as much as half. And it’s not one industry branch, it’s...