Depending on the climate or environmental conditions, people have to adapt to live and work. For instance, northern states are quite arid and water is scarce, while central Mexico is temperate but...
For good: Plant trees. Recycle many materials such as metal, glass, paper and plastics. Some farms have sustainable farming methods. For bad: Drive oil-based motor vehicles. Have many polluting...
i myself, as a citizen, can tell you that the government SAID many policies but, as your question is 'what is hong kong doing', the answer is 'nothing'.