The Supreme Court on Monday commenced hearing on a plea against felling of trees in Mumbai's Aarey to set up a Metro car shed.
A special bench of justices Arun Mishra and Ashok Bhushan started hearing the plea filed by a law student on the felling of trees.
The felling of trees is being opposed by green activists and local residents.
The apex court decided on Sunday to register as PIL a letter addressed to Chief Justice of India Ranjan Gogoi by law student Rishav Ranjan seeking a stay on the cutting of trees.
A notice was posted on the Supreme Court website about holding the urgent hearing.