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• Reference: 2014/3103
• Question by: Stephen Knight
• Meeting date: 17 September 2014

What percentage of London Underground's energy supply came from renewable sources in 2013/14?

• Reference: 2014/3104
• Question by: Stephen Knight
• Meeting date: 17 September 2014

Further to your claim that a national scrappage scheme for diesel vehicles is now needed as a priority [Evening Standard, 01 September 2014] why have you consistently refused to implement a financial incentive scheme to encourage taxi drivers to purchase the cleanest available vehicles in London, promised in each and every year of your first mayoral term?

• Reference: 2014/3106
• Question by: Stephen Knight
• Meeting date: 17 September 2014

Further to your answer to MQ2014/2634 - in which you stated that "average NO2 levels across monitoring sites near busy roads in Stuttgart, Paris, Munich, Rome and Milan are all higher than those recorded for London. Mexico City's levels are nearly double those of London, and Hong Kong, Istanbul, Beijing and Shanghai all have higher average readings as well" - can you confirm whether you were referring to hourly maximum nitrogen dioxide (NO2) values for these cities, or annual average values? Please provide the source of the data that you used to indicate that NO2 concentrations are worse elsewhere.

• Reference: 2014/2634
• Question by: Stephen Knight
• Meeting date: 23 July 2014

Given the UK government's recent admission that it does not expect London to comply with legal nitrogen dioxide (NO2) limits until "after 2030", together with the recent statement from a Kings College academic that Oxford Street has the highest level of NO2 pollution in the world, whose responsibility is it to rid London's air of dangerous diesel fumes: the EU's, the UK government's or yours?

• Reference: 2014/2635
• Question by: Stephen Knight
• Meeting date: 23 July 2014

How many 'daily charges' were purchased in 2013 for vehicles which did not meet the Phase 3 emissions standard for vans and mini-buses or the Phase 4 emissions standard for lorries, buses and coaches?

• Reference: 2014/2636
• Question by: Stephen Knight
• Meeting date: 23 July 2014

How many warning letters were issued to owners of vehicles seen driving within the Low Emission Zone (LEZ) which did not meet the relevant emissions standards in 2013?

• Reference: 2014/2638
• Question by: Stephen Knight
• Meeting date: 23 July 2014

How do you respond to the report produced by CPRE London and Neighbourhoods Green which found that only around half of London boroughs have made a specific policy commitment in relation to your 'All London Green Grid' (ALGG) which is intended to support a network of green spaces and river-based corridors throughout London? What more will you do to support boroughs in further integrating the ALGG into their relevant local policies?

• Reference: 2014/1779
• Question by: Stephen Knight
• Meeting date: 11 June 2014

Given your recent decision to approve the construction and delivery of a new 'London.gov.uk' website - at a cost of £ £1.85million - will you now reconsider your previous decision not to publish smog alerts on the GLA website during periods of high air pollution?

• Reference: 2014/1775
• Question by: Stephen Knight
• Meeting date: 11 June 2014

How much have you invested to date in stimulating early uptake of the Green Deal?

• Reference: 2014/1776
• Question by: Stephen Knight
• Meeting date: 11 June 2014

How many developments for which an energy assessment was carried out did not meet the CO2 targets set out in Policy 5.2 of the London Plan in 2013? Please also confirm the total value of cash-in-lieu contributions made to offset any shortfall in CO2 emission reductions.