Podcast Summary: Climate Connections

Episode: Hospitals are rethinking laughing gas. Here's why
Host: Dr. Anthony Leiserowitz
Air Date: April 14, 2026
Produced by: Yale Center for Environmental Communication

Overview

This concise episode explores how hospitals are addressing the climate impacts of nitrous oxide—commonly known as laughing gas. Dr. Anthony Leiserowitz speaks with anesthesiology experts about why their facilities are phasing out centrally piped nitrous oxide, revealing both the environmental implications and opportunities for climate-positive change in health care.

Key Discussion Points & Insights

The Issue with Nitrous Oxide

• Greenhouse impact: Nitrous oxide is a potent greenhouse gas, much stronger than carbon dioxide in terms of its warming effect.
  • "Nitrous oxide is a very strong greenhouse gas." – Dr. Anthony Leiserowitz (00:16)
• Hospital use: For over a century, hospitals have routinely used nitrous oxide as an anesthetic, most often delivered through centrally piped systems in operating rooms.

Leakage from Central Pipelines

• Significant wastage: Dr. Leonard Golden, Chair of Anesthesiology at Jacoby Medical Center and North Central Hospital, explains that a substantial fraction—in some cases, the majority—of nitrous oxide leaks out of pipelines before reaching patients.
  • "A large amount or even the majority of the gas actually leaks out before it even gets to the patient through the pipelines." – Dr. Leonard Golden (00:34)

Hospital Interventions: A Climate Solution

• Eliminating central systems: To prevent leakage, these hospitals have removed central nitrous oxide pipelines. Instead, they provide portable tanks only when medically necessary.
• Alternative anesthetics: Dr. Sudhir Jain, Chief of Anesthesiology at Bellevue Hospital, points out that recent pharmaceutical advancements mean patients can often receive alternative medications, reducing the need for nitrous oxide.
  • "With the advances in pharmacology and the availability of other medications, seemed to make sense that, hey, maybe we don't need to use this particular gas as much as we used to." – Dr. Sudhir Jain (00:58)

Maintaining Quality of Care

• No compromise on patient care: The switch to portable tanks and other medications has not diminished the quality of medical treatment.
• Leading by example: The doctors hope their approach serves as a model for other hospitals, showing climate-friendly changes in health care delivery are possible.
  • "You know, hopefully our example shows other people that this is possible." – Dr. Sudhir Jain (01:15)

Notable Quotes & Memorable Moments

• On the potency of nitrous oxide:
  “Nitrous oxide is a very strong greenhouse gas.”
  — Dr. Anthony Leiserowitz (00:16)
• On pipeline leakage:
  “A large amount or even the majority of the gas actually leaks out before it even gets to the patient through the pipelines.”
  — Dr. Leonard Golden (00:34)
• On medical advances and reduced reliance:
  “With the advances in pharmacology and the availability of other medications, seemed to make sense that, hey, maybe we don't need to use this particular gas as much as we used to.”
  — Dr. Sudhir Jain (00:58)
• On setting an example:
  “You know, hopefully our example shows other people that this is possible.”
  — Dr. Sudhir Jain (01:15)

Timestamps for Key Segments

• 00:01 – Introduction by Dr. Leiserowitz
• 00:14 – Nitrous oxide’s climate impact
• 00:19–00:44 – Hospitals' experience and issue of pipeline leakage (Dr. Leonard Golden)
• 00:44–01:09 – Switching to portable tanks and newer anesthetic options (Dr. Sudhir Jain)
• 01:09–01:20 – Impacts on care; leading by example
• 01:20 – Episode wrap-up

Episode Takeaway

Hospitals in New York are reducing their climate footprint by moving away from centrally piped nitrous oxide, leveraging new medical technologies to minimize emissions—all without compromising patient care. Their proactive approach demonstrates that meaningful climate action is possible across sectors, including health care.