Hong Kong is facing serious air pollution, which can cause irreversible damage to our society. To cope with the problem, some may suggest the adoption of larger-scale usage of solar power. However, I don’t think that it is feasible to widely use solar power in Hong Kong. Firstly, from the economic perspective, I think it is very difficult to instal a lot of solar panels in our city. The cost of solar power is very high, even higher than that for conventional fossil fuels (for example, coal and natural gas). That is because we have to buy not just one, but a large number of solar panels. Also, we have to rent a big flat for enough area to place the solar panels, and it will be very expensive to do so. Moreover, we have to purchase new generating units, as we cannot possibly use the old units for solar energy. Despite its unbelievably high cost, the efficiency of converting solar energy into electricity is very low. Secondly, considering Hong Kong’s geographical structure, I think it is difficult to use solar power widely here. Solar panels require large open areas for instalments, while Hong Kong is fairly mountainous. So it would be difficult to find open and flat spaces to place solar panels in a place this hilly. Moreover, Hong Kong’s high population density and scarce land already makes it difficult to find enough space for living. If Hong Kong had enough space, it should be used to build public housing, which is a much more serious problem. We cannot possibly try to solve one problem if it gives rise to a worse one. If citizens oppose the promotion of solar energy, it will surely not be feasible, and it is very unlikely that they, especially the underprivileged, will support such an idea when using solar power would mean higher electricity bills for them. All in all, I do not think it is practical to have wide use of solar power in Hong Kong. We should be looking at other forms of renewable energy that would have a much greater chance of success. Eiman Arif, Tuen Mun