Chelsea have been urged to 'go green' with plans for their new 60,000 capacity stadium at Stamford Bridge.
The redevelopment plans have been signed off by Hammersmith and Fulham council, but must now be signed off by London Mayor Sadiq Khan.
And there is pressure on the club to use renewable energy technologies to compensate for the massive increase in fans heading to the west London ground, according to a report in The Times.
A report from the mayor's office says the stadium plans are 'generally acceptable', but concerns are raised in the document.