BUSAN Environmental groups have slammed the presence of dozens of petrochemical and fossil fuel industry lobbyists at U.N. talks on a plastic pollution treaty, accusing them of "obstruction" and "misinformation." "It's a direct conflict of interest," said Delphine Levi Alvares, global petrochemical campaign coordinator at the Center for International Environmental Law ( CIEL ). "Their interests conflict with the objective of the mandate [of the talks] and their presence here challenges