Carbon dioxide tends to dominate climate discussions, but methane plays an outsized role in near-term warming. Over a 20-year period, methane traps significantly more heat than CO₂, and scientists attribute roughly one-third of today’s warming to methane emissions. Project Drawdown describes it as a “climate super pollutant 80 times more potent than carbon dioxide”.
According to Project Drawdown, human activities emit approximately 380 million tons of methane each year. The largest share comes from the global food system, responsible for more than half of these emissions.
Four major food-related sources stand out:
- Ruminant livestock. Animals such as cattle, sheep, and goats release methane during digestion, making livestock one of the largest contributors to human-caused methane emissions.
- Food waste in landfills. When discarded food decomposes without oxygen, it produces methane; food waste represents a significant portion of landfill emissions.
- Rice cultivation. Flooded rice paddies create low-oxygen conditions that generate substantial methane each year.
- Crop residue burning. Burning agricultural leftovers releases methane alongside other air pollutants.
The encouraging news: many methane solutions already exist. Improving farming practices, reducing food waste, and shifting consumption patterns away from beef can meaningfully reduce emissions in the near term.
In addition, many nations have pledged to cut methane emissions. Under the Global Methane Pledge, participating countries aim to reduce global methane emissions by at least 30 % below 2020 levels by 2030 through stronger monitoring and mitigation policies.