London could become the world's first National Park City with a series of measures to boost its green credentials, under plans set out by Sadiq Khan.
The London mayor unveiled a £9 million greener city fund to help local groups plant thousands more trees and improve green spaces for communities, as he launched his draft environment strategy for the capital.
The funding is a first step to make London the world's first National Park City, with a target to make more than 50% of the capital's area green by 2050.
Mr Khan outlined plans to protect and increase the amount of parks and green spaces, use planning regulations to protect the green belt and ensure developments have more green roofs, green walls, rain gardens and wildlife habitats.
There are also proposals to tackle air pollution and make London a "zero-carbon" city by 2050 with energy-efficient buildings, more solar power and increased recycling.