The Response column offers those who have been written about in the Guardian an opportunity to reply. If you wish to respond, at greater length than in a letter, to an article in which you have featured, please email response@guardian.co.uk
London, far from being toxic, is leading the way in tackling air pollution
Matthew Pencharz
Matthew Pencharz: Response: If Zoe Williams cycled in Beijing, Mexico City or Delhi, she’d quickly realise how much better we at City Hall tackle air quality
Open data is a public good. It should not be confused with data sharing
Jeni Tennison
Jeni Tennison: Response: There is lots of data within the public sector that should be open. This ensures a level playing field for everyone who can benefit
Philip Hammond ignores the truth about drone atrocities
Clive Stafford Smith
Clive Stafford Smith: Response: Drones are killing civilians in Pakistan and Yemen, while Britain refuses to admit its co-operation with illegal US attacks