EPA’s Clean Air Scientific Advisory Committee released a draft review Friday that recommended Administrator Michael Regan tighten standards on fine particulate matter. POLITICO’s Alex Guillén breaks down that recommendation, along with the health, environmental and financial implications. Nirmal Mulaikal is a POLITICO audio host-producer. Alex Guillén is an energy reporter for POLITICO Pro. Carlos Prieto is an audio producer for POLITICO. Raghu Manavalan is a senior editor for POLITICO audio. Jenny Ament is the interim executive producer of POLITICO’s audio department.