Earlier quoted context omitted.
That is still misleading, grossly. More happens in the water than just releases of methane - there's plant and animal life producing oxygen and consuming decomposing materials. Plus 1989 is a brand new dam. The Hoover Dam was completed in 1936[1], and is expected to have a service life of at least 10,000 Years.[2] 10,000 years at a minimum. It will have paid dividends in renewable energies so many times over by then,…
How is it misleading? Explain please. What I see is a 250MW dam built in 1989, that produces in 2011 the equivalent GHGs of a 1000MW coal plant.
And at a point will not produce equivalent GHG's, which your coal plant will continue to do so.
The coal plant won't even be able to operate in 10,000 years, this dam will continue to do so.