Final answer:
The greatest percentage growth in MSW management between 1960 and 2000 was in recycling programs, as efforts increased to reduce waste in landfills and to promote more sustainable practices like recycling and composting.
Step-by-step explanation:
The greatest percentage growth in municipal solid waste (MSW) management between 1960 and 2000 was in recycling programs. During this period, there was a significant cultural and environmental shift towards waste reduction and sustainability. Efforts were focused on reducing the amount of waste sent to landfills and increasing the practice of recycling and composting to manage waste more effectively and sustainably.
The two primary methods of waste disposal have traditionally been landfill and incineration. However, the negative environmental impact of these methods, including air pollution and groundwater contamination, has led to a push for alternative waste management solutions, such as recycling and composting. The necessity to manage waste in a cost-effective and environmentally responsible manner is underscored by the growing quantities of waste generated with population and economic growth.