John Carey is a freelance writer covering the environment, energy, science, technology and medicine. Until 2010, he was senior correspondent at BusinessWeek, where during 21 years he wrote about a range of issues, from sequencing the human genome and global warming to tobacco regulation, election technology, cholesterol-lowering drugs and renewable energy. He is a former editor of The Scientist, was a writer and editor for National & International Wildlife, and spent six years at Newsweek, where he covered science, technology, and health.