McLaren published its annual sustainability report on Thursday, with the team boasting significant improvements.
These include a 22% reduction in greenhouse gas emissions from a 2019 baseline and a 19% reduction in total waste compared to 2019 with nothing sent to landfill.
F1 has made a significant sustainability push in recent years, with the world championship publicly targeting to be net zero carbon by 2030.
This effort also saw the introduction of a cost cap in 2021, but Brown believes this restriction is limiting progress.
"We strongly believe in the cost cap and wouldn't want to see anything that undermines its integrity, but current regulations have created some unintended barriers when it comes to investing in sustainability," said Brown.
"It's been fantastic to see so much support from F1 and other teams on this issue, and we're delighted that the FIA has established a working group to explore next steps."
This group consists of F1, the FIA and the 10 teams, and McLaren has "proactively championed" discussions to exclude certain environmental and sustainability projects from the cost cap.
Although an initial list of exclusions has been introduced, McLaren has further called for a set of comprehensive cost cap exclusions that support investment in sustainability projects and initiatives, without compromising the cap's integrity.
Source: Autosport