Japan for the 9th time - Oct and Nov 2019 - Page 4 - 236

This is lake Usui. It is a slight detour from the trail, but worth it. There are three picturesque bridges to walk over. In the foreground is silt building up that is being prevented from going over the dam and down stream. A recent study found this kind of silt build up at dams, especially hydroelectric dams which were previously thought to be green power, causes a lot of methane to be produced as all the organic matter sinks and decays ANAEROBICALLY. Without the dams leaves and stuff in streams decay aerobically, and release 13.8x less CO2 (equivalent). I did the maths.

Camera Details: RICOH IMAGING COMPANY, LTD., RICOH GR III
Settings: 1/200 at f/7.1, ISO 100, 18 mm
Date: 04 November 2019 Time: 10:56:03