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.
"If it is approved, the Scottish Government will be declaring open war on Scotland's countryside - no landscape will be safe from industrialisation by these high rise wind machines."
Protest spokesman Mark Rowley said: "We have really touched a nerve and we feel that those who cherish the importance of Scotland's rural landscapes are behind us."
Andrew Shaw, managing director of developer North British Wind Power, said just six houses are within about three miles (4.8km) of the site.
He added: "The site is also crossed by a massive power line which inevitably involves degradation of the area. But it also means the wind farm could be connected to the grid."
Mr Shaw said "posturing" from protesters should not be allowed to cloud the decision of the public inquiry.
And he criticised Prof Bellamy's involvement, adding: "He was discredited by many in the scientific community a long time ago."