See www.environmentaldefense.org/ documents/ 3 www.environment-agency.gov.uk/ yourenv/eff/1190084/business _industry/agri 4 www.ospar.org/eng/html/ welcome.html 5 States that, if an action or policy might cause severe or irreversible harm to the public, in the absence of a scientific consensus that harm would not ensue, the burden of proof falls on those who would advocate taking the action.