An Indian rapper is targeting Dow Chemical with rhymes, demanding the U.S. company pay more in victims` compensation and environmental damages stemming from a horrific chemical gas leak that killed thousands of people and sickened countless others in Bhopal in India in 1984. Sofia Ashraf debuted ``Dow vs. Bhopal: a Toxic Rap Battle`` in June . The tragedy  was caused by 40 tons of deadly methyl isocyanate gas leaking from a pesticide plant run by Union Carbide Corp., later purchased by Dow  Chemical. The leak killed more than 15,000 and sickened at least a  half-million more. Activists say thousands of children have since been born with brain damage, missing palates and twisted limbs. Union Carbide paid $470 million in a 1989 deal reached with the Indian government, which Dow has said takes care of its liability. But activists say the sum was far too low and ignored the need to clean up the environment.  She hopes the video  will change that, with its provocative clips of dancers wearing gas masks, Prime Minister Narendra Modi orating, President Barack Obama donning sunglasses and presumptive Republican presidential candidate Donald Trump doused in water interspersed with images of hospital rooms and Ashraf herself rapping angrily at the camera.