"Hong Kong's waste charging scheme aims to encourage citizens to reduce waste, promote recycling and environmental protection. Under this scheme, households pay for garbage bags based on the size of their residential property and the number of occupants. The cost of each bag includes waste collection, transportation, and cleaning expenses. This policy aims to promote waste reduction and recycling efforts to improve waste management and environmental protection.

Common methods of waste charging typically depend on local government policies and regulations, including several forms:

1. Garbage bag fees: Residents are required to purchase designated garbage bags to dispose of their waste, with each bag incurring a certain fee. Through a system of garbage bag fees, the government can encourage citizens to reduce waste generation, promote recycling, and protect the environment.

2. Waste capacity charges: Some areas charge fees based on the amount of waste generated by households or residential properties, or impose fixed charges.

3. Incentive and penalty mechanisms for waste sorting and recycling: Through waste sorting and recycling programs, the government may offer incentives to encourage active participation in recycling activities. Subsequently, additional charges may be imposed on households that do not participate in waste sorting.

These methods aim to encourage citizens to reduce waste and promote recycling, environmental protection, and the establishment of a more sustainable waste management system. Specific models and details may vary by region and country."