While the primary cause of Chronic Obstructive Pulmonary Disorder (COPD) is exposure to tobacco smoke worldwide, in developing countries such as India, other risk factors such as indoor air pollution are considered to be one of the major risk factors. Indoor air pollution mainly consists of biomass fuel, wood burning, and stove smoke, etc., used for cooking. In developing countries such as India biomass fuel accounts for up to 75% of the domestic energy supply. Exposure to indoor air pollution can also affect the unborn child and present a risk factor for developing COPD later in life.
It is estimated that 50% of all households worldwide and 90% of all rural households continue to use biomass fuel as their main domestic source of energy.
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