Neil Mackenzie on the environmental impact of the Loch Kemp project

Your article (First major hydropower projects in Great Britain in 40 years given go-ahead, 26 June) describes the proposal to build three pumped storage schemes in the Scottish Highlands. But it does not mention the huge environmental cost.

One scheme, the Loch Kemp project, will draw water from Loch Ness and pump it into the upper reservoir created by enlarging Loch Kemp. A giant power station is to be built in protected ancient woodland on the shores of Loch Ness. This woodland is a special area of conservation, an internationally recognised site, and will be partly destroyed by the power station and access road.

Readers respond to an article about Erin Brockovich’s battle against datacentres and voice their fears for the environment

What are the benefits obtained from AI’s massive use of electricity and water (‘We’re up against forces that have all the money in the world’: Erin Brockovich on her battle against AI datacentres, 29 June)? Analysis shows that the top four uses of AI are “therapy/companionship”, “technical assistance and troubleshooting”, “fun and nonsense”, and “fan fiction and storytelling”.

AI use for therapy, and due to loneliness, appears not to reduce loneliness. AI provides affirmation, but at the expense of reducing the social skills needed to interact in the real world. Teachers report that students’ use of AI reduces their capacity for critical thinking.