The dramatic coastline of Cornwall in southwest England is dotted with chimney stacks left over from its long-gone mining industry. But out to sea lies another legacy -- thousands of tons of tin, waiting to be mined.
"There's 22,000 tons of tin there," said Mike Proudfoot, chief executive of the mining firm Marine Minerals, looking out over the stunning north Cornish coast and stretching a hand over the deep blue expanse of the Celtic Sea.
Proudfoot's company has applied for a licence that it could see it start extracting this lucrative resource in 2015 in a ten-year project.
But the idea has not gone down well with Cornwall's surfers, who say large-scale tin mining could spell wipeout for their huge waves.
Cornwall's tourist industry, the biggest employer in this ruggedly beautiful region, has also raised fears that mining could damage the fragile marine environment and pollute its pristine beaches.
The huge tin reserves are the remains of mining waste dumped in rivers in the 18th and 19th century, when the industry was in full swing. Over the years, currents carried the scraps down to the sea and ground them down into tiny grains.
Tin is used to produce an enormous range of electronic goods, from mobile phones to tablet computers. The current price of $21,000 per ton is less than the record $33,600 reached in April 2011, but still high by historic standards.
But surfers are worried that extracting the silt in large quantities will affect the local quality of the sport by eroding the sand banks that help give Cornwall its crashing waves.
"When we've seen a similar project along this stretch of coastline in the past, we've seen a really detrimental impact on the quality of surfing," said Andy Cummins, campaign director of the environmental charity Surfers against Sewage.
Surfing brings around £64 million pounds ($99.6 million, 74.8 million euros) a year to the Cornish economy and provides 1,600 jobs, according to official figures.
"The whole of the north coast of Cornwall is massively important for tourism so anything that would damage the tourism industry has to be taken really seriously," Tony Flux of the National Trust heritage body told AFP.
This is not the first time Proudfoot, a South African who has lived in Cornwall since the 1970s, has attempted to cash in on the region's tin.
He made his first foray into the industry in the 1980s, but was foiled by a crash in the price of the metal.
-- 'Minimal effect on environment' --
This time around, he has moved to reassure opponents that a change in extraction method will leave most of the sediment in place and have a minimal effect on the environment.
"What we used in the 1980s is called dredging. But now, we're not dredging, we're mining," Proudfoot told AFP.
Under the new method, the sediment is sucked up by machines and filtered on a boat out at sea, he said. Just five percent would be taken to a factory for processing with the rest put immediately back into the water.
But some surfers have cast doubt on Marine Minerals' attempts to allay their concerns.
"I think the company is perhaps pulling the wool over people's eyes, saying they have a new method," said 22-year-old Matt Arnold, a surfer who has just graduated with a degree in mining engineering.
"It's going to be a variation of an old method," he told AFP as he took a break from the waves at Porthtowan, a favourite beach for surfers.
As with other heavy metals, tin mining carries a risk of chemical pollution, and environmental campaigners are seeking guarantees that the company will protect the water quality if the plans go ahead.
Marine Minerals insists that early samples reveal only very low levels of arsenic.
"In our samples, arsenic is not more that one part in a million. It's very low. And there's no mercury," Proudfoot said. "What we always say is we will not go forward if this project is not socially and environmentally acceptable."
His company is spending £500,000 on a study on the environmental impact, he added.