The article does a good job of pointing out that environmental activism in India is entirely conducted by the upper-middle class. The majority of people living in Mumbai simply do not have the time to care one way or another about these things.
Last month I was in Mumbai visiting relatives, and found the ocean front is still covered in trash as it has been for decades. The vendors selling tea and snacks along the oceanfront are technically not allowed to sell there, so their primary concern is to make more money than they paid as a bribe to the beachfront police that day - the single-use cups and plates making it into a trash can is the least of anyone's concerns.
Last month I was in Mumbai visiting relatives, and found the ocean front is still covered in trash as it has been for decades. The vendors selling tea and snacks along the oceanfront are technically not allowed to sell there, so their primary concern is to make more money than they paid as a bribe to the beachfront police that day - the single-use cups and plates making it into a trash can is the least of anyone's concerns.