"World cities generate about 1.3 billion tonnes of solid waste per year.
This volume is expected to increase to 2.2 billion tonnes by 2025.
Globally, solid waste management costs will increase from today’s annual $205.4 billion to about $375.5 billion in 2025. Cost increases will be most severe in low income countries (more than 5-fold) and lower-middle income countries (more than 4-fold). Solid waste is a large source of methane, a powerful greenhouse gas (GHG) that is particularly impactful in the short-term. "
-Excerpt from the World Bank Organizations’ ‘What a Waste – A Global Review of Solid Waste Management’