Aquatic ecosystems source of half of global methane emissions

Methane emissions from aquatic ecosystems are potentially a larger source of methane than direct anthropogenic methane sources, such as agriculture or fossil fuel combustion. Aquatic ecosystems and wetlands contribute at least as much as half of the total methane emissions budget.

from Latest Science News -- ScienceDaily https://www.sciencedaily.com/releases/2021/04/210407093231.htm