17-08-2017 - Imperial Valley, California, USA Staff from the Comite Civico del Valle hoisting a flag to warn pupils and the local community of daily poor air quality, Brawley High School. The School Flag Air Quali... © David Bacon

15-08-2017 - Coachella Valley, California, USA Maria Pozar, her daughter Jacqueline and baby Leslie, North Shore, near the receeding waters of the Salton Sea. Jacqueline suffers nose bleeds when the dust blows fro... © David Bacon

25-01-2008 - A cross for one of the victims of suicide and the lighthouse at Beachy Head, Sussex, UK 2008 © Howard Davies

25-01-2008 - A sign for The Samaritans by a telephone box at Beachy Head, on the Sussex cost, a location known for frequent suicides. © Howard Davies

25-09-2005 - Last Time written in rock. Cliff from which suicide has been committed, Caithness, Scotland © Rob Bremner