Environmentalism produces the vanguard of technology

Only millennia after the Egyptians harnessed the sun-driven wind to sail upstream on the Nile, environmentalists now have a vessel that uses the same power source and will go, occasionally, almost as fast as a well designed sailboat.

Just, as you'll see, without any of the grace or lines that characterize a well designed sailboat, but with the need to replace batteries every so often, and costing at least three times as much.   Even better, consider the possibility of needing to get somewhere at night, or on a cloudy day, without the auxiliary diesel. 

You will, however, get all the pollution associated with making a large solar array and a 60kW-H lithium ion battery pack.  Honestly, it seems that environmentalists are not about preserving the environment at all, but are rather about replacing well known, beautiful, useful technologies with ugliness.