The turbines would destroy the landscape say campaigners
Environmental campaigners are stepping up their calls to put wind farms off-shore.
The move follows new applications for so-called "monster" turbines in Devon and Cornwall.
There are three applications in the two counties for turbines which measure between 240 ft and 320 ft from the tip of the blade to the ground.
Standard turbines measure about 160 ft, but produce a fraction of the energy output.
Campaigners, fearful that beauty spots will be ruined, have responded by calling on all wind farms to be placed off shore.
Ian Hutton-Penman, chairman of the Caradon branch of the Council for the Protection of Rural England (CPRE), said the government should re-think its plans for renewable energy, published in the energy White Paper last week.
In it, the government aims to double the share of electricity from renewable sources from 10% in 2010, to 20% in 2020.