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Mercury levels rising in Pacific yellowfin tuna, study says. Mercury levels in yellowfin tuna caught in the Pacific Ocean have been rising at a 3.8 percent annual rate since 1998, according to a new study.
Genetically modified coral could help save reefs, report argues. The controversial practice of “environmental engineering” should be adopted in the battle to save the world’s coral reefs from the devastating effects of climate change, scientists have argued.