(1)The Secretary of State must by regulations set a target (“the PM2.5 air quality target”) in respect of the annual mean level of PM2.5 in ambient air.
(2)The PM2.5 air quality target may, but need not, be a long-term target.
(3)In this section “PM2.5” means particulate matter with an aerodynamic diameter not exceeding 2.5 micrometres.
(4)Regulations setting the PM2.5 air quality target may make provision defining “ambient air”.
(5)The duty in subsection (1) is in addition to (and does not discharge) the duty in section 1(2) to set a long-term target in relation to air quality.
(6)Section 1(4) to (9) applies to the PM2.5 air quality target and to regulations under this section as it applies to targets set under section 1 and to regulations under that section.
(7)In this Part “the PM2.5 air quality target” means the target set under subsection (1).