The HC was hearing a PIL filed by 'Vanshakti', a prominent NGO, its director Dayanand Stalin and Kshitji Ashtekar, one of the residents of the area, among others.
A bench headed by the Chief Justice Mohit Shah asked MMRDA to submit within two weeks the constitution of the Tree Authority and inquired whether there was any representation of NGOs in it.
Earlier, the bench had temporarily restrained MMRDA and Municipal Corporation of Greater Mumbai (MCGM) from felling trees in this area.
The PIL had alleged that respondents have begun widening the road which falls within an eco-sensitive area and is in close vicinity of the Sanjay Gandhi National Park.
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The work involves felling of trees in large numbers, which is in direct contravention to provisions of Maharashtra (urban areas) Protection and Preservation of Trees Act as well as Environment Protection Act, said the PIL.
The PIL urged the HC to quash and set aside MMRDA's proposal for widening the Aarey Colony Road and MCGM's move to construct a car shed for the proposed project.
The petition also pleaded that trees located in the area must be protected and preserved to ensure that ecological balance is not disturbed.