Green construction: Creating emissions-free building sites Building sites produce emissions and air pollution. Cities, developers and construction machinery manufacturers are looking for ways to clean them up. Hong Kong residents have to navigate the city's many noisy and polluting construction sites The dust, smell, noise and heat from the Hong Kong's many construction sites are often "unbearable" for many of the city's residents, particularly in its hot, muggy summer. "No matter if it's in winter or summer," said 28-year-old Dorothy Wong. "It's dusty and stinky from diesel. And so noisy that I usually have to cover my ears when I pass by them. In Hong Kong, it's not easy to go around them as the city is rather packed."