I'm old enough to remember when there were 2 types of methane emissions: anthropogenic, and the rest. As we keep heating the planet, the boundaries get blurred...
A new paper on how increased methane emissions from freshwaters may become inevitable:
www.nature.com/articles/s41...
How the balance of microbial methane production and oxidation in freshwater systems will change with warming is unclear. This study uses natural warming experiments to demonstrate that methane emissio...