He told a conference organised by the Vatican in Rome, that the capital had led the way despite Conservative opposition.
The Tory party chairman, Richard Holden, accused the mayor of 'politicising' the climate debate to hide his failings.
The Greens said the mayor's 'cowardly' election campaign set back progress.
Mr Khan was among several mayors from the C40 group of world cities, of which he is co-chairman, who met Pope Francis to discuss their efforts to tackle climate change.
[
add
]
[
|
|
...
]