[Retracted] Energy-Saving Benefits of Air-Source Heat Pump-Assisted Solar Water Heating Systems in Large Stadiums

Table 3

Pollutant emissions in different systems.

Contrasting options	Air source heat pumps	Electricity	System in this paper	Gas	Solar electric assist
Carbon dioxide (t)	1.11	1.02	0.15	1.01	0.57
Sulphur dioxide (t)	0	0	0	0	0
Dust (t)	0.31	0.01	0.03	0.01	0.03
Others (t)	1.33	0.01	0.05	0.1	0.04