Table : Energy costs per study site Energy cost per unit a SITE A SITE B SITE C Mean (SD) Mean (SD) Mean (SD) n n n Charcoal (bag<5kg) (USD/kg) b $0.24 ($0.03) $0.27 ($0.10) $0.22 ($0.07) 20 116 108 Charcoal (bag>20kg) (USD/kg) b $0.18 ($0.03) $0.16 ($0.03) $0.14 ($0.02) 22 6 14 Electricity (USD/kWh) c $0.04 $0.02 $0.02 Methane (USD/m3) d $0.00 $0.00 $0.00 a Exchange rate: $1 USD = 7.25 ZMW (May 2015, oanda.com) b Charcoal cost calculated via local market and household survey (weight of full charcoal bags and cost recorded) c Electricity tariffs obtained via utility bills d Biogas provided free of charge at time of household surveys
Table : Energy costs per study site Energy cost per unit a SITE A SITE B SITE C n Mean (SD) n Mean (SD) n Mean (SD) Charcoal (bag<5kg) (USD/kg) b 20 $0.24 ($0.03) 116 $0.27 ($0.10) 108 $0.22 ($0.07) Charcoal (bag>20kg) (USD/kg) b 22 $0.18 ($0.03) 6 $0.16 ($0.03) 14 $0.14 ($0.02) Electricity (USD/kWh) c $0.04 $0.02 $0.02 Methane (USD/m3) d $0.00 $0.00 $0.00 a Exchange rate: $1 USD = 7.25 ZMW (May 2015, oanda.com) b Charcoal cost calculated via local market and household survey (weight of full charcoal bags and cost recorded) c Electricity tariffs obtained via utility bills d Biogas provided free of charge at time of household surveys
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