HELI is a global effort by WHO and UNEP to support action by developing country policymakers on environmental threats to health. HELI encourages countries to address health and environment linkages as integral to economic development, and supports valuation of ecosystem 'services' to human health and well-being. Promoting better access to policy-relevant tools and knowledge about health and environment linkages is the focus of this web portal. In each priority risk category, including toxics substances, viewers will find a "one-stop shop" containing directories of web-accessible resources and policy briefs. Links and information are focused on the human and monetary 'cost' of environmental hazards to health. Policy relevant tools include scientific data and assessment, impact assessment and economic assessment. In Arabic, Chinese, English, French, Russian and Spanish.