Methane's greenhouse effect is believed to be more than 20 times that of carbon dioxide. Leaks of methane from gas fields are a major issue that need to be dealt with.
From The Japan Times
Methane’s greenhouse effect is believed to be more than 20 times that of carbon dioxide. Leaks of methane from gas fields are a major issue that need to be dealt with.
Source: https://www.japantimes.co.jp/news/2024/10/06/japan/japan-south-korea-cut-methane-emissions/