Using a long-handled net, Ronnel Narvas scoops up discarded plastic soft drink bottles, shopping bags and palm-sized sachets as he wades through a foul-smelling tributary in the Philippine capital Manila. Using a long-handled net, Ronnel Narvas scoops up discarded plastic soft drink bottles, shopping bags and palm-sized sachets as he wades through a foul-smelling tributary in the Philippine capital Manila. Environment Phys.org – latest science and technology news stories