In addition, it is important to demonstrate the sustaina- bility and cultural acceptability of a given intervention. Documenting these impacts will help generate the evidence to convince policy-makers and donors at all levels that household energy interventions work in reducing one of the major global threats to children's and women's health. In 2005, WHO organized a series of 5-day training workshops as a step towards building regional capacity in the area of household energy and indoor air pollution monitoring. Workshops were conducted as a contribution to the Partnership for Clean Indoor Air in collaboration with the Pan-American Health Organization, the United States Environmental Protection Agency, the German Technical Cooperation (GTZ), the Center.