The burning of wood is probably our oldest source for heating and cooking, and has been used by man for tens of thousands of years. Combustion of biomass, such as wood, animal dung and crop residues, is still used for cooking and heating by a large proportion of the global population, especially in less developed countries. In the industrialised world, and in countries with a cold winter climate, wood and other biomasses are widely used for heat production in residential wood log boilers, stoves and fireplaces. With the recognition of the limitations in amounts and durability of petroleum-based products, as well as an increasing concern regarding the issue of global warming, the interest in wood and other biomasses as alternative, sustainable and CO2-neutral energy sources for fuel production and heating has emerged.
In the present issue of the European Respiratory Journal, Orozco-Levi et al. 1 studied wood-smoke exposure and the risk of chronic obstructive pulmonary disease (COPD) in Spain. This contradicts the common assumption that “natural and biological materials” are generally friendly and harmless, as they have been in use since ancient times. Concerning the emissions from domestic wood and charcoal combustion, there is clearly a background of a large number of organic and inorganic components that may be associated with adverse biological events. The potential health effects of by-products, such as volatile organic …
