
global warming potential
 sum of ( characterization factor*mass)
 ex/compare to CO2 ratio

LCA
can calculate by using characterization factors

cradle to grave
 1. extraction
 2. processing
 3. mfg
 4. use
 5. EOC (grave

Annuity compounding
 i and N have to be same time frame, for example, annual interest .07 and 4 yrs
 i= .07/12, N = 48
 OR
 i= .07, N =4

SLN
straight line depreciation

