Environment minister Tse Chin-wan has rejected the idea of legislation to force businesses to cut down on their use of packaging, saying many are willing to sign up to the cause voluntarily.

The Environmental Protection Department (EPD) launched a "Packaging Reduction Charter" last week and more than 100 firms have signed up so far.

The charter is aimed at eight sectors, including supermarkets, food and drink manufacturers and the hospitality trade.

Writing on his official blog on Sunday, Tse said given that packaging comes in various forms, it would be difficult to set standardised versions via legislation.

Firms signing up to the charter agree to submit an annual report on their use of packaging and the information will be collated by the government with a view to taking steps towards future improvements, he said.

The minister noted that as well as pledging to reduce their use of packaging or find sustainable alternatives, the companies involved have agreed to encourage their suppliers, business partners and customers to do the same.