The noise for the wind turbine comes from mostly the gearbox, though there are efforts under way to reduce that, including completely eliminating the gearbox from the design.
But at this point, I think debating with you on point to point is a little... pointless, so I'll just leave this:
On earth, there are 5 sources of energy. Unlike in 1900, we now have a pretty damn good understanding of physics to know that this is all we get.
- We have energy coming from the Sun. There's a fair bit of it, and there might be enough to sustainably allow us to live. This gives us Wind / Solar power. - We have energy coming from the moon. Tidal power does work in some places, but it's magnitudes smaller than the energy from the Sun. - We have carbon fuels - We have nuclear fuels - We have geothermal energy... though efforts to tap that has produced only earthquakes so far.
That's all we get, unless someone goes out and develops cheap fusion power (highly unlikely situation - fusion reactions produce a lot of neutrons which are very difficult to deal with). I don't think there is any other "alternative energy sources".