In looking for a solution to this problem, we have to first recognise that not all wind projects are necessarily well thought out. Certainly, there are a variety of practical steps that could be taken to improve the situation, such as better location of wind farms and the use of waste land or old industrial sites. Technological developments may change the situation. The introduction of more efficient variable-speed wind turbines, which can operate effectively with lower wind speeds, could reduce pressure on upland sites. Costs have also dropped dramatically since the early days, to one-third of the cost of wind projects established in 1990. That makes it more economically viable to choose less windy sites.