Environmentalist Professor David Bellamy has spoken out against a wind farm proposed for Romney Marsh in Kent.
Protesters claim the wind farm would be an environmental disaster
He was joined by Tory leader Michael Howard and the shadow industry secretary Tim Yeo in making a statement about the plans in London on Monday.
"It is not green. It chops up birds. It destroys landscapes," he said.
The scheme was rejected by Kent and Shepway councils with other councils also opposing the plans, but Npower still wants to build the wind farm.
Support from campaigners
The Conservative leader and MP for Folkestone and Hythe said planning rules would be changed to prevent local objections to wind farms being overruled.
Mr Howard said current policy relied too heavily on on-shore turbines to meet targets for renewable energy.
Other environmental campaigners are backing the wind farm.
A protester dressed as a polar bear stood outside the press conference with a placard saying: "Back wind power or the bear gets it."
But Caroline Solly, a member of the Romney Marsh wind farm advisory action group, said: "The turbines are not only being placed right in the centre of a unique flat landscape but in the middle of several nature reserves.
"It is going to require 10.5 miles of new road built on the marshland. It's industrialising the marsh.
"We are talking about 26 turbines, each the height of a 30-storey skyscraper."
John Ainslie, Npower's head of development strategy, said: "We believe in the merits of our case. As any applicant of a planning application has, we have a right to be heard at appeal and that's what we are doing.
"This is a wind farm which is going to make a substantial contribution to local clean electricity generation.
"It will provide an amount of electricity equal to something like 80% of the houses within the Shepway council area."