Hundreds of protesters were joined by conservationist David Bellamy on Saturday in a march against a proposed wind farm.
Campaigners said about 350 people took part in the protest through an area of the Lammermuir Hills in the Scottish Borders, where 48 turbines could be built.
The Say No To Fallago group argues that unspoiled countryside will be threatened by the construction.
Developers insist the area is remote and would enjoy access to a nearby power line - and accused Bellamy, who is a professor of adult and continuing education at Durham University and a special professor of botany at Nottingham Unviersity, of being "discredited" for his views on climate change.
A formal decision on the application is due from a second public inquiry.
In a statement, Professor Bellamy said: "The outcome of the public inquiry into this wind farm application will be a watershed moment.