[...]
The ombudsman, a Greek official who investigates public complaints, said in a June report the country needs to reduce construction and protect water resources and coastal areas to maintain healthy tourism.
It warned of the growing environmental risks from tourism, particularly the additional demands on water supplies for drinking, swimming pools and water parks.
[...]
A pilot study, carried out by Greek researchers and UNESCO, the U.N. cultural agency, found that smaller islands in the Aegean Sea already need double the amount of water they can naturally produce to meet demand from tourists, which is set to increase twofold by 2030.
"The more these islands are developed, the less attractive they will be to visitors," said Vayanos.
Greece should tailor tourism to make it more compatible with environmental standards, including the use of zoning, and concentrate development in specific areas, he said.
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