The organization is of the opinion that under half of the world's six billion people cook with solid fuels, and many a times breathing in smoke equivalent to 40 cigarettes a day. They calculate that an annual investment of $13 billion could halve the number of people cooking with such fuels by 2015.
According to WHO this "kitchen killer" leads to the deaths of 1.5 million people, with 900,000 of those in sub-Saharan Africa and South East Asia each year. They are of the opinion that smoke from using wood, dung, coal and other solid fuels on open fires or simple stoves kills more children under the age of 5 than malaria or AIDS.
The analysis by organization suggests that a $13 billion annual investment would have an annual payback of $91 billion as a result of less time lost to illness and collecting fuel.