The Lizard is a beautiful and protected area, detailed as an Area of Outstanding Natural Beauty. According to Cornwall AONB “… nearly a third of Cornwall is designated as an Area of Outstanding Natural Beauty. From the spectacular coast and rugged uplands to the tranquil wooded valleys and hidden coves and creeks, the Cornwall AONB is indeed outstandingly beautiful and has the same status and protection as a National Park.” http://www.cornwallaonb.org.uk/welcome
This is explained further by the Cornwall Wildlife Trust who state that “The Lizard peninsula is a place apart, where a combination of the mild climate and complex geology has produced an area with a very distinctive character. It includes some habitats and species which are unique to the Lizard and others which are extremely rare. This is reflected in the large National Nature Reserve, 
Special Area of Conservation and Sites of Special Scientific Interest designations, which cover around 25% of the peninsula. Cornwall Wildlife Trust own two nature reserves on the Lizard; North Predannack Downs Nature Reserve and Windmill Farm Nature Reserve. The Lizard is one of a handful of the most important botanical areas in the UK, with a long history of study.” http://www.cornwallwildlifetrust.org.uk
Tourism is a vital part of the rural economy in Cornwall, and particularly the Lizard peninsula. The AONB status is deeply valued by visitors and recognised as a key economic resource. Further information can be found by visiting http://www.landscapesforlife.org.uk/cornwall-aonb.html
A superquarry will result in the industrialisation of a Marine Conservation Zone (MCZ), Area of Outstanding Natural Beauty (AONB) and a Site of Special Scientific Interest (SSSI), and is also adjacent to two Special Areas of Conservation (SAC). The tranquil landscape would be disrupted by the intrusion of a man made excavation with associated quarry and harbour installations on an enormous scale.
The combination of unusual geology, topography and mild oceanic climate has led to the development of a unique flora at the neighbouring Lowland Point (owned by the National Trust), with many rare and endangered species. These provide breeding grounds for a wide range of birds and a stop off points for migratory birds, all of which would be impacted by industrialisation of the quarry.