Punjab Chief Minister Maryam Nawaz Sharif says a comprehensive waste management system is being introduced in all major cities of the province.In her message on the occasion of International Day of Zero Waste being observed today, she said every day should be observed as Zero Waste Day.Maryam Nawaz said, for the first time, a sustainable and effective system of village sanitation is being devised to provide clean environment to our future generations.She said people should adopt eco-friendly alternatives by reducing single-use plastics.Source: Radio Pakistan