66 • Sustainability Report 2012
Unit
2012
2011
2010
2009
2008
Environmental
Resource Use / Conservation (Hong Kong)
Naphtha saved
#
Metric tonnes
13,355
13,996
13,657
11,234
9,960
Town gas saved
#
Cubic metres
3,404,587
3,528,364
4,089,133
3,626,266
3,849,776
Water saved
#
Cubic metres
218,887
177,463
224,358
213,971
220,363
(Gas Production)
Photovoltaic (PV)
Square metres
75
75
75
75
75
panels installed
Grid electricity saved through PV
kWh
86,500
86,600
86,600
86,900
86,600
panels
Electricity saved
#
(North Point
kWh
4,254,325
4,234,225
4,142,825
3,993,105
3,763,818
headquarters and Ma Tau Kok office)
CO
2
emissions avoided equivalent
Metric tonnes
2,981
2,963
2,900
2,795
2,635
to electricity saved* (North Point
headquarters and Ma Tau Kok office)
Landfill gas utilisation as heating
Cubic metres
2,362,000
2,364,000
2,761,000
2,361,000
2,528,000
fuel in gas production
from ShuenWan
Landfill gas utilisation as heating
Cubic metres
20,129,181
20,789,390
19,925,269
16,065,375
14,381,262
fuel in gas production
from NENT SNG
Air Emissions (Hong Kong)
CO
2
Daily average in
904
913
896
896
929
metric tonnes
(11.92)
(11.91)
(11.96)
(12.13)
(12.35)
(Metric tonnes per
million MJ of town gas)
NO
x
Daily average in kg
318
356
344
324
342
(Kg per million MJ of
(4.20)
(4.65)
(4.59)
(4.39)
(4.55)
town gas)
SO
x
Daily average in kg
1.5
1.5
1.9
2.5
3.6
(Kg per million MJ of
(0.02)
(0.02)
(0.03)
(0.03)
(0.048)
town gas)
Greenhouse gases
4
Metric tonnes
360,634
362,307
355,958
357,043
370,647
(Production equipment)
in terms of
CO
2
equivalent
Aqueous Emissions (Hong Kong)
Wastewater
Daily average
435
447
351
404
493
in cubic metres
(5.74)
(5.84)
(4.68)
(5.47)
(6.55)
(Cubic metres per million
MJ of town gas)
