Table 1

Description of site characteristics

	Urbanisation	Setting	Vehicular traffic	Development	Altitude	Daily use of biomass fuels
Lima	Urban	Dense shanty town outside centre of Lima	Dense throughout the day (50)	Paved and dirt roads	Sea level	Rare
Urban Puno	Urban	Dense city centre	Dense between 7:00 to 19:00, otherwise minimal	Primarily paved roads	3825 m elevation	Rare
Tumbes	Semiurban	Semiurban setting with enrolment predominantly from farming communities far from city centre	Little to none; bicycles and walking are the primary forms of transportation	Primarily dirt roads	Sea level	Moderately prevalent
Rural Puno	Rural	Farming communities far from city centre	Little to none; bicycles and walking are the primary forms of transportation	All dirt roads	3825 m elevation	Highly prevalent