Clean cooking fuel and improved kitchen ventilation linked to less lung disease

Improving cooking fuels and kitchen ventilation is associated with better lung function and reduced chronic obstructive pulmonary disease (COPD), according to research published in this week's PLOS Medicine. The study, led by Pixin Ran from the Guanzhou Medical University, China, followed 996 villagers from southern China for 9 years to examine the effects of cleaner fuels and better kitchen ventilation on lung function and disease.

An estimated 3 billion people worldwide heat their homes and cook by burning biomass such as wood or animal dung. The resulting is thought to cause more than a million deaths per year from COPD, but few studies to date have examined the long-term consequences of improving indoor air pollution on and disease.

For this study, the researchers offered nearly 1000 participants from 12 villages access to biogas (a combustible clean fuel made by composting biomass at room temperature in a biogas digester) and improved kitchen ventilation, and people adopted these interventions according to their preferences. The participants provided details about their lifestyle and had their lung function measured both at the outset of the study and at its end 9 years later, and some were also interviewed and examined 3 and 6 years into the study. The researchers also tested in a random subset of participants' households.

Compared with those who chose not to change fuel or ventilation, participants who used biogas or improved their kitchen ventilation retained more of their lung function as they aged. People who adopted both improvements performed even better in lung function tests, and they were also less likely to develop COPD.

While the were not randomly assigned to a control group (who declined changes) or intervention groups (who used biogas, improved ventilation, or both), and the study can therefore not prove that the improvements caused better lung function and less COPD, the results nonetheless suggest that the interventions can reduce indoor air pollution and prevent some of its adverse consequences on health.

The authors conclude that "while we recognize that implementing community interventions to change how individuals cook in rural settings in developing countries remains a challenging task, substituting biogas for biomass fuel for cooking and improving kitchen ventilation could lead to a reduction of the global burden of COPD, especially in non-industrialized nations."

More information: Zhou Y, Zou Y, Li X, Chen S, Zhao Z, et al. (2014) Lung Function and Incidence of Chronic Obstructive Pulmonary Disease after Improved Cooking Fuels and Kitchen Ventilation: A 9-Year Prospective Cohort Study. PLoS Med 11(3): e1001621. DOI: 10.1371/journal.pmed.1001621

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Mali announces new Ebola case

10 hours ago

Mali announced Saturday a new case of Ebola in a man who is fighting for his life in an intensive care unit in the capital Bamako.

Plague outbreak kills 40 in Madagascar: WHO

10 hours ago

An outbreak of plague has killed 40 people in Madagascar, the World Health Organization said, warning that the disease could spread rapidly in the country's densely populated capital Antananarivo.

UN chief: Ebola cases in Mali a 'deep concern'

Nov 21, 2014

The United Nations chief warned Friday that Ebola may be easing in part of West Africa but is still hitting hard in other areas and outpacing the international response.

User comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.