Filipino activists hold slogans during a protest at the National Ecology Center as part of Earth Day activities in Manila on Sunday April 20, 2008. En

Filipino activists hold slogans during a protest at the National Ecology Center as part of Earth Day activities in Manila on Sunday April 20, 2008. Environmental advocates said they staged the rally to symbolize the problem with the toxic stockpiles of polychlorinated biphenyls (PCBs) wastes, and recognize the effort to rid the country of these chemicals which are toxic to human health and the environment. (AP Photo/Aaron Favila)

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