The LEAP model requires data for at least the base year and any of
the future years. Then, using the function such as interpolation or
extrapolation or the growth rate method, the future energy demand
and emissions are estimated for the other years. The central concept
in LEAP is an end-use driven scenario analysis. The LEAP framework
is disaggregated in a hierarchical tree structure of four levels: sector,
sub-sector, end-use, and device (Fig. 2.1). The concept of this study
Environment Programme (UNEP), and is a joint UNEP/SEI activity
[12]. LEAP is an accounting framework, within which the user can
create models of demand and supply.