A thousand people attended a festival today organised by the RSPB in response to EDF's plans to build a nuclear reactor in Suffolk.
Sizewell C will be built on the boundary of the Minsmere Nature Reserve which is home to more than five and a half thousand species of wildlife.
The RSPB manages the site and opposes the energy giants plans.
They say building the reactor so close to the nature reserve could threaten the thousands of different species of wildlife that call Minsmere home.
EDF say that the environmental impact of the new site would be kept to a minimum, and argue that new jobs for local people will be provided.
Among the visitors supporting the festival today (Sunday, September 15) was television presenter, Bill Turnbull, who lives nearby.
There's no infrastructure or communications for it here. What is here, is Minsmere - where the RSPB have been trying really hard to get all these birds to come back. And we are going to risk it all just simply because it's a convenient place to build a power station."
The public consultation into EDF's proposal for Sizewell C will end on September 27.