Nothing will happen to Sundarban. Power plant will emit CO2 which is food for the greeneries there. Make sure there is no sulphur.
There is no clean coal:
http://en.wikipedia.org/wiki/Clean_coal
Environmentalists such as Dan Becker, director of the Sierra Club's Global Warming and Energy Program, believes that the term clean coal is misleading: "There is no such thing as clean coal and there never will be. It's an oxymoron."[31] The Sierra Club's Coal Campaign has launched a site refuting the clean coal statements and advertising of the coal industry.[32]
Complaints focus on the environmental impacts of coal extraction, high costs to sequester carbon, and uncertainty of how to manage end result pollutants and radionuclides.
The paleontologist and influential environmental activis Tim Flannery made the assertion that the concept of clean coal might not be viable for all geographical locations.[33][34]
Critics also believe that the continuing construction of coal-powered plants (whether or not they use carbon sequestration techniques) encourages unsustainable mining practices for coal, which can strip away mountains, hillsides, and natural areas. They also point out that there can be a large amount of energy required and pollution emitted in transporting the coal to the power plants.
The Reality Coalition, a nonprofit organization composed of Alliance for Climate Protection, Sierra Club, National Wildlife Federation, the Natural Resources Defense Council and the League of Conservation Voters, ran a series of television commercials in 2008 and 2009. The commercials were highly critical of clean coal, stating that without capturing CO2 emissions and storing it safely that it cannot be called clean coal.[35]
Greenpeace is a major opponent of the concept because they view emissions and wastes as not being avoided but instead transferred from one waste stream to another.[36]