Environmentalists say the move caused “brutal damage” to the local ecosystem.

Spain has been badly affected by the coronavirus, with 23,800 deaths.

Maria Dolores Iglesias, who heads an environmental volunteer group in the Cadiz region, said the bleach “killed everything on the ground, nothing is seen, not even insects”.

The beach and its dunes are protected breeding and nesting places for migratory birds and Ms Iglesias said she had seen at least one nest with eggs destroyed by the tractors.

Ms Iglesias said that because of the lockdown, wildlife had been thriving on the beach.

“The beach has its own way of cleaning itself, it was not necessary,” she said.

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Source:  BBC