IT was ''no'' to lunch boxes when students of 10 secondary schools did their share in contributing towards a better environment on Earth Day last week.
By staying in school for lunch, the students avoided the use of lunch boxes brought from home or a restaurant.
Lunch boxes are made of styrofoam, and styrofoam poses a threat to the environment.
Thousands of styrofoam boxes are disposed of every day in Hong Kong. Substances called CFCs are used in the manufacture of styrofoam.
CFCs have an adverse affect on the environment - they deplete the ozone layer, which filters out harmful ultraviolet radiation from the sun before it reaches the earth.
The campaign, organised by environmental group Friends of the Earth (FoE), was one of the Earth Day activities aimed at raising public awareness of the environmental problems in Hong Kong.
''We hope students can learn from the experience that it does not cost us much to protect the environment,'' said FoE public relations officer Karen Lam.
