Residua (formerly World Resource Foundation, WRF), is the overall name of an NGO providing a world-wide information service to encourage the recovery of resources from post-consumer waste. Sections include the Resource Recovery Forum a network of organisations with a shared interest in seeing society achieve more sustainable waste management.

The aims of the Forum include

promoting the best practicable environmental option for waste

collaborating in research and development

providing links between waste producers, handlers and processors

producing accessible information

liaising with Government, the European Union and other decision-makers

Publishes the Warmer Bulletin.

WWW server includes: full text of information sheets and technical briefs; sample extracts from the Warmer Bulletin; links to other waste sites.

Offers an online information request service, for subscribers to Warmer Bulletin, for information on waste management and resource recovery.