News Climate Australian fires in 2019–2020 had even more global reach than previously thought Blazes dumped a vast amount of CO2 into the air and triggered faraway algae blooms in the ocean Smoke rises from burning trees near the town of Nowra, in Australia’s New South Wales, on December 31, 2019. New research links smoke and ash from the wildfires that raged across southeastern Australia from October 2019 to February 2020 to large blooms of marine algae far to the east in the Southern Ocean.