• An error crept into the edit of our story about atmospheric pollution and ozone (22 February, p 7). The reactive species in question are uncharged hydroxyl radicals not negatively charged hydroxyl ions as we stated.
• In our special report on sunken oil tankers in the Pacific (22 February, p 12), we mistakenly referred to Sefanaia Nawadra, Marine Pollution Adviser at the South Pacific Regional Environment Programme, as a female. Our apologies for any offence caused.
