Petrobras has intensified high-frequency airgun seismic exploration at the Amazon River estuary, with sound levels reaching up to 230 decibels and explosions occurring every 10 seconds. This extreme underwater noise directly disrupts the communication, foraging, and reproduction of pink river dolphins and offshore cetaceans, causing marine mammals to lose their way and become stranded and die. Meanwhile, leaks of drilling mud and small amounts of crude oil continue to pollute the mangrove wetlands at the Amazon estuary. Combined with the discharge of mercury-contaminated wastewater from illegal gold mining upstream, this combined land-and-water pollution continues to intensify ecological pressure on the river basin.
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