Nicholas Vincent is a passionate environmentalist and freelance writer. He is deeply committed to promoting... Nicholas Vincent is a passionate environmentalist and freelance writer. He is deeply committed to promoting sustainability and finding solutions to the most pressing environmental challenges of our time. In his free time, Nicholas enjoys the great outdoors and can often be found exploring some of the most beautiful and remote locations around the world. Read more about Nicholas Vincent Read More
Cities across the Global South are grappling with escalating methane pollution due to the inadequate disposal of organic waste. With a significant lack of waste collection services, about 70% of rubbish consists of organic matter, which when untreated, releases methane—a potent greenhouse gas—and other pollutants into the environment.
Source: Reuters/YouTube
According to a recent report by the United Nations Environment Programme (UNEP), the volume of municipal waste is expected to surge by two-thirds by 2050. This increase will push the cost of waste management from $252 billion to an estimated $600 billion annually, accounting for Pollution control, health impacts, and Climate change mitigation.
In response to these challenges, the C40 Cities initiative has set ambitious targets to improve organic waste management in these regions. By 2030, the initiative aims to ensure that cities in the Global South can collect and treat at least 30% of their organic waste. This effort not only aims to reduce methane emissions but also to enhance overall urban sanitation and air quality.
Cities like Rio de Janeiro have already made significant strides in this area. Rio’s Caju Ecopark, for instance, processes 850 tonnes of organic waste monthly from schools and supermarkets, transforming it into valuable compost and biogas. Similarly, Dar es Salaam in Tanzania has ramped up its organic waste management, composting 360 tonnes daily from local markets with plans to increase this capacity.
The state of Kerala in India has adopted a decentralized approach to tackle organic waste. Here, households and businesses are encouraged to compost on-site, while waste collectors provide door-to-door collection services, turning organic waste into a resource for local farmers. This initiative has successfully diverted up to 65% of organic waste from landfills, marking a significant step towards sustainable waste management.
Moreover, the Waste Wise Cities (WaCT) project by U.N. Habitats is aiding cities in collecting accurate data to develop more effective waste strategies. For instance, in Bukavu, Democratic Republic of Congo, WaCT data revealed that only 7% of waste was being collected, demonstrating a critical need for improved infrastructure and policies.
As these cities continue to innovate and implement sustainable waste management practices, the involvement of the private sector is seen as crucial for developing new business models that go beyond recycling, aiming instead for comprehensive waste reduction and management solutions.

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