A solar energy proposal roughly the size of 30 football pitches could be built on land near Truro if plans are approved.
The site would cover 16.2 hectares north west of Carnemough Farm about a mile from Grampound Road, generating 7MW, enough to power 1,750 homes in Cornwall. Plans are with Cornwall Council with a decision expected to be made before December.
Objections have already been lodged on the council's planning website.
Steve Hicks is not convinced of the benefit from solar panel farms and wrote: "Solar energy is clean and free, they say, but solar panels are manufactured, and doing so creates the dirtiest hazardous waste you can imagine.
"Solar energy companies don't tell us that manufacturing of solar panels is fossil fuel-intensive, from mining of crystalline silicon and transforming it to silicon wafers and that they produce millions of tonnes of hazardous waste each year.
"I have spoken to farmers that have told me that the grazing of sheep between these panels is not really feasible, as they are usually placed so close together that sheep cannot get between them, or because of the shadow caused by the panels that the ground between them may not get enough sun."
Philip Howson, from a Ladock walking group, also objected to the plans.
On the council's planning website he wrote: "The proposed development lies immediately adjoining and to the south of public bridleway 16. Considerable work has been carried out recently to restore this right of way to public use after years of neglect. Sadly, if this development were to go ahead, the view from the path would be of an industrial character rather than the present pleasant rural setting."