<span class=normal>PC urged people to join her in the campaign. Im off to launch the 4th edition of NDTV Toyota Greenathon in Agra. Join me n 100s of school kids as we try n clean up the Yamuna at 330 pm! she tweeted. <BR><BR><br><p class=clear>&nbsp;</p>Wearing oversized sunglasses and a white kurti, the actress picked up a masons fork and cleaned the floating rubbish from the bank of the Yamuna at the Dussehra ghat, with the iconic Taj Mahal in the backdrop. The whole exercise took about an hour. At the event, PC spoke about the reason for cleaning the river from the Taj Mahal. This time we began our campaign from Agra because tourist inflow is maximum here. Taj Mahal is on the bank of river Yamuna, which has become a dumping zone of waste materials now. If we do not protect our environment our future will be dark, Priyanka said.</span>