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When the 2020 California fires released more than 100 million metric tons of carbon dioxide, they didn’t just offset the state’s progress in reducing emissions progress; they turned the state from a carbon sink into a carbon source.

Trump’s support can be expected for renewed clear-cutting in the 17-million-acre Tongass forest, the same old-growth carbon sink Dunleavy hoped to profit from; building a 211-mile industrial-use-only road through the pristine Brooks Range to open the door to copper mining; and permitting an open-pit gold mine near the headwaters of the salmon-rich Kuskokwim River.

Data indicates that the southeastern Amazon has now turned from a carbon sink to a source.

However, to calculate the carbon sink and biodiversity opportunities associated with shifting cropland use in the U.S., the authors of the GFI report significantly limited the scope of their analysis.

The findings have worrisome implications about the ocean’s vital ability to act as a carbon sink, or a place that removes greenhouse gases from the atmosphere, said David Nielson, the study’s lead author and a researcher at the Max Planck Institute for Meteorology in Hamburg, Germany.