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London's famous Kew Gardens stopped watering the lawns and switched off the sprinklers as part of a big drive to become Climate Positive.
The Royal Botanic Gardens set out a series of ways to reduce their carbon footprint and help tackle the "environmental emergency".
The vision for the future revealed how many lawns are not watered because they "naturally green up" within a few days of rainfall.
Kew Gardens' Sustainability Strategy also highlights how staff try to avoid using sprinklers.
Bosses said they wanted to go beyond ‘Net Zero’ with Kew committing to becoming 'Climate Positive' by 2030.
Other progress made at Kew includes:
Generating renewable energy from solar panels since 2012
Upgrading the vehicles on site at Kew Gardens to 100% electric power
Starting work to measure the carbon sequestration from the trees and land
Building sustainable, timber new buildings
Installing the first net-zero-ready electric heat pump at Kew Gardens
Eliminating the vast majority of single-use plastic from food & drink outlets
"This new strategy and commitment to be climate positive by 2030 is the culmination of many years of work," said Director of RBG Kew, Richard Deverell.
"Tackling the environmental emergency must sit at the very heart of everything we do and as a global plant science institution and visitor attraction we have a unique responsibility to act now," Mr Deverell added.