In science news around the world, Johnson & Johnson becomes the third COVID-19 vaccinemaker to receive U.S. emergency use authorization for its product, the first vaccine against the disease that requires only a single dose. Countries are drastically lagging in the fossil fuel cuts needed to reach the goals of the Paris climate agreement, an analysis suggests. A new foundation will provide $250 million for cancer research, one of the largest such gifts ever. El Salvador becomes the first country in Central America to be certified free of malaria by the World Health Organization. A study identifies “nepotistic” biomedical journals that publish many articles by authors who also serve as their editors-in-chief. U.S. President Joe Biden ends a policy, imposed last year by then-President Donald Trump, that had barred most noncitizens not already in the United States from seeking permanent residency and work permits—which industry groups said prevented hiring of needed scientists and skilled technical workers.