Amazon is raising free-shipping minimums for some customers who don’t have Prime memberships Amazon has been quietly raising the amount some customers must spend on its site to get free shipping.This article was originally published on this website. Read More At ‘Davos of energy’, AI looks to gas to power its rapid expansion Microsoft takes over a Texas AI data center expansion after OpenAI backs away Building facade solar panels on outside walls can generate power while cutting cooling costs Molecular interface tuning lifts tandem solar cell efficiency to 25.1% Integrated strategy unlocks 29.76% efficiency for all-perovskite tandem solar cells AI’s arrival complicates Big Tech climate goals, and some worry it’s locking in more fossil fuels