Wildlife conservation activists, students and representatives of those displaced because of various development projects were among those who took part in the chain which extended for almost a kilometre.

"We want to save the only green lungs of the city," Bhattacharjee said, referring to Arey Colony in north Mumbai. "And why only Mumbai city, environment-related issues in the entire country should be addressed with a top priority," Bhattacharjee said.

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The ACG is agitating to protect the green cover in Arey Colony, where around 2,700 trees are to be cut to make way for a car-shed for Metro. Trees are being chopped down arbitrarily for the Metro and activists are not allowed to be present when trees are cut, Bhattacharjee said, Advocate Abhishek Bhatt, another activist, said, "Measures for protection of ecology do not feature in any political agenda across the country."

Tribals and Kolis (fishermen), original inhabitants of Mumbai, were being driven out from their lands for so-called development, the activists said in a statement.

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