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• Reference: 2020/4066
• Question by: David Kurten
• Meeting date: 19 November 2020

The makers of wind turbines, solar panels, electric vehicles and other supposedly environment-friendly technologies claim that these technologies are ‘green,’ ‘clean’ and ’just.’ Cobalt is an expensive metal used in electric car batteries, costing about $35,000 per ton. Some 59% of all cobalt comes from the Democratic Republic of the Congo. Cobalt mining in DRC is often done by children, some as young as seven, with as many as 40,000 working in what are reported to be brutal and unsafe conditions 1 . Is it morally right that the GLA should be developing energy policy, without paying heed to the...

• Reference: 2020/2938
• Question by: David Kurten
• Meeting date: 17 September 2020

Given your closeness to Extinction Rebellion and your support for ‘Black Lives Matter’, do you agree with Extinction Rebellion’s co-founder Gail Bradbrook, who in the London Evening Standard on Friday 4 September 2020, questioned the ‘racist pollution impact of the Silvertown Tunnel.’ What is your understanding of the term ‘racist pollution’ and will it impact your support for the Silvertown Tunnel?

• Reference: 2020/0455
• Question by: David Kurten
• Meeting date: 24 February 2020

How is the pledge you made in September 2015 to plant two million trees during your first term, if you became London’s Mayor, coming along? https://www.theguardian.com/politics/2015/sep/24/sadiq-khan-labour-cand…

• Reference: 2020/0456
• Question by: David Kurten
• Meeting date: 24 February 2020

You have stated that three-monthly average NO2 levels in central London fell from 89 micrograms per cubic metre in 2019 Q1 to 57 micrograms per cubic metre in 2019 Q3. What were the three-monthly average NO2 levels in 2018 Q1, 2018 Q2, 2018 Q3, 2018 Q4, 2019 Q2, 2019 Q4, and where can the full set of comparable data be publicly viewed? (Q1 = Jan - Mar, Q2 = Apr - Jun, Q3 = Jul - Sep, Q4 = Oct - Dec)

• Reference: 2020/0457
• Question by: David Kurten
• Meeting date: 24 February 2020

You stated in the recent Peoples’ Question Time in Wood Green that it would take 193 years for NO2 levels to fall below the legal limit without intervention. What is the source reference for this claim?

• Reference: 2020/0137
• Question by: David Kurten
• Meeting date: 16 January 2020

What level of particulate matter (PMs) do you consider to be hazardous to human health?

• Reference: 2019/14269
• Question by: David Kurten
• Meeting date: 18 July 2019

It is known that PM 2.5 levels on the London Underground are many times higher than the legal limit, with Hampstead being one of the worst examples, but what are average annual concentrations of NO 2 , SO 2 , methane, ozone and volatile organic compounds at the platform level in Hampstead Station and other PM 2.5 blackspots?

• Reference: 2019/14271
• Question by: David Kurten
• Meeting date: 18 July 2019

What is the composition of the different elements and compounds in PM2.5s above ground?

• Reference: 2019/14272
• Question by: David Kurten
• Meeting date: 18 July 2019

What is the composition of the different elements and compounds in PM2.5s below ground on the tube network?

• Reference: 2019/14273
• Question by: David Kurten
• Meeting date: 18 July 2019

Do you consider that total PM2.5 concentration is a good measure of assessing the health risk of particulate matter, or would it be better to measure and report the PM2.5 concentrations of individual chemicals and material groups such as iron, carbon, pollens, salt, upholstery fabrics? Given your differing and incompatible narratives on the risk of tube dust above and below ground, do you think a rethink is necessary to move towards reporting separate PM2.5 levels rather than total PM2.5 levels as a global standard?