; (C) collaborate with academic experts and community leaders to understand and establish best practices for decarbonizing health care operations; and (D) develop and evaluate the Office's strategy to tackle health care decarbonization and sustainability and mitigating environmental impacts within the Centers for Medicare & Medicaid Services. (d) Report to Congress Not later than 2 years after the date of the enactment of this Act, and every 2 years thereafter, the Secretary shall submit to Congress a Health Care Sustainability and Environmental Impact Report, which shall be prepared by the Director of Sustainability and Environmental Impact, with appropriate assistance from other agencies in the executive branch of the Federal Government. Each such report shall include the following: (1) A summary of interagency collaboration. (2) A methodology to designate and accredit health systems that achieve substantial reductions in emissions and environmental harm as Climate-Friendly health systems. (3) An inventory of Climate-Friendly designated health systems, their strategies, challenges, and best practices for sustainability and mitigating environmental impact, and any significant effects of these efforts on— (A) quality of care; (B) patient safety; (C) safety of health care workers and health care facility workers; (D) health care costs