Instead, the customers must be convinced of their benefits over present technologies (World Bank, 2010a). The physical infrastructure required for modern fuel use (such as natural gas or biogas lines to customers) and distribution or supply chain frameworks (such as countrywide LPG bottle distribution and refill services) will require time and resources to establish. Improved cookstoves, alternatively, improve the efficiency and safety of existing stoves with chimneys but still anchor the user to reliance on traditional biomass.