by TreeHugger
Greenhouse Gas Emissions From Large Hydropower Reservoirs Far Lower Than Currently Assumed
10:57 am in carbon emissions, global climate change, hydropower, Science & Technology by TreeHugger
Three Gorges Dam, photo: Harvey Barrison/CC BY-SA
From an environmental perspective hydropower is a mixed bag. Depending on how it's done (micro, small, run of river, large scale) it can be anything from a great low-carbon sustainable energy source to an environmental disaster destroying habitat, displacing people and animals, and even spewing greenhouse gases from the l...Read the full story on TreeHugger
Every year there is massive fluctuation in water levels on the River Ganga in Varanasi. Now, in June, in some places you can more or less walk all the way across the river but at high water all the sand you see will be covered by meters and meters of water. The fluctuations discussed below are in addition to this age-old variation. Photo: 
A good editorial on Brazil's 
