Methane emission, also: https://www.scientificamerican.com/article/methane-emissions-may-swell-from-behind-dams/ https://www.scientificamerican.com/article/meth

Methane emission, also: https://www.scientificamerican.com/article/methane-emissions-may-swell-from-behind-dams/ https://www.scientificamerican.com/article/methane-emissions...