Amazon will buy a new type of HVAC system for its commercial buildings to slash energy use.

When it comes to AI models, size matters.Even though some artificial-intelligence experts warn that scaling up large language models (LLMs) is hitting diminishing performance returns, companies are still coming out with ever larger AI tools. Meta’s la…
Laser chips using light instead of radio waves deliver over 360 Gbps indoors while cutting energy use, offering a new way to ease Wi-Fi congestion in dense environments.
The startup is partnering with utilities to help homeowners determine the best upgrades to cut their energy use.

The Trump administration has given corporations plenty of convenient excuses to retreat from their climate commitments, with its moves to withdraw from the Paris Agreement, roll back emissions regulations, and scale back clean energy incentives.But wi…