Are renewable energy sources really CLEAN?

"It takes 80 gallons of oil to lubricate one windmill, and he spoke about the wind turbine. There are 2,212 turbines in Quebec, which require 176,960 gallons of oil.
....if we are worried about the environment and we want to be environmentally friendly, what happens to those windmills? Their lifespan is 20 years, and they are not recyclable."