In 1999 Trustpower installed 48 wind turbines along the Tararua Ranges, stage one of three, that saw another 86 turbines added in 2004 and 2007.
Those concerned about our reliance on fossil fuels applauded the move that now produces enough electricity to run about 26,000 homes, depending on which calculation is used.
But there were detractors.
Many did not like the aesthetics, and still don't, of giant structures peppering the pristine Tararua Range landscape.
Did we simply swap out one form of pollution for another?