Question to the Department for Environment, Food and Rural Affairs:

To ask Her Majesty's Government what steps they are taking to develop the fine particulate matter (PM2.5) monitoring network in order to monitor the progress made towards achieving the air pollution targets set under the Environment Act 2021.

As part of our work to assess progress towards the new PM_2.5 targets, we have already invested £1m to expand the PM_2.5 monitoring network in 2021/22, and have added 17 monitoring sites (as of July 2022) to the existing 63 (December 2021). By the end of 2025 we will have invested a further £10m to at least double the size of the original PM_2.5 network.