The big tech industry’s claims about the climate benefits of artificial intelligence (AI) are largely unproven and unsubstantiated, according to a new report from a coalition of climate advocacy and accountability groups.

The report found that only 26 percent of the climate claims made by big tech companies cited published academic research, with 36 percent citing no evidence whatsoever.

The average data centre uses enough energy to power roughly 5,000 UK homes, and between 11 million and 19 million litres of water per day, the same as a town of 30,000 to 50,000 people. There are 480 data centres in the UK, with another 100 planned for the next five years.