They never cause "no harm". Built out at sea, they might cause the "least harm"; when all the factors are considered.
.. and your point is.??
Different location, different economic conditions, different culture, different climate,........
Based on the way that they spend it, I imagine that that's what they think.
Currently less than 10% of energy - in 2003 around 55TWh out of nearly
600TWh total production.