Environmental Degradation Exposes Vulnerable Communities to Growing Dangers

Climate change is altering ecosystems and exposing communities to new and intensifying dangers. The UN Environment Programme (UNEP) has released The Frontiers Report 2025, highlighting four critical areas where environmental degradation intersects with human vulnerability: legacy pollution, melting glacier microbes, undamming rivers, and climate risks for an ageing population. The report warns that some issues may be local or relatively small-scale today but have the potential to become issues of regional or global concern if not addressed early. UNEP Executive Director Inger Andersen emphasized the need for action to protect people, nature, and economies from threats that will only grow with each passing year.

Key Takeaways:

• Melting glaciers pose a significant threat, with many estimated to disappear by the end of the century if greenhouse gas emissions are not reduced. This will unleash dormant microbes and increase the risk of floods downstream.
• Undamming rivers, such as in the Colombian Amazon, can lead to significant environmental and social consequences, including restricted access to drinking water, food supplies, and increased health risks for children.
• The global population is ageing, with the global share of people over 65 expected to rise from 10% in 2024 to 16% by 2050. This demographic shift will increase the vulnerability of older people to climate change and environmental degradation.
• Legacy pollutants, such as heavy metals and persistent organic pollutants, are being stirred up and released into the environment as a result of flooding, posing significant health risks to communities.
• Effective adaptation strategies must evolve to protect the ageing population and address the interconnected challenges of climate change, environmental degradation, and human vulnerability.

Statistics:

• Over 420,000 children are out of school in Brazil, Colombia, and Peru due to drought, according to UNICEF.
• Rivers and streams can recover remarkably once barriers are removed, with up to 80% of vegetation and habitat restored in a few years.
• The global share of people over 65 is expected to rise from 10% in 2024 to 16% by 2050, with most living in cities and exposed to extreme heat, air pollution, and frequent disasters.
• The world's ageing population will face increased risks from climate change, with the elderly suffering disproportionately from rising numbers of deaths and illnesses amid recent heat waves.

Sources:

• United Nations Environment Programme (UNEP). (2025). The Frontiers Report 2025.
• UN Secretary-General António Guterres. (2023). Visit to the Annapurna base camp in Nepal.
• United Nations Children's Fund (UNICEF). (2024). Drought affecting over 420,000 children in Brazil, Colombia, and Peru.
• World Meteorological Organization (WMO). (2024). Predictions of ever more hot weather.
• UNOCHA/Pierre Peron. (2024). A family outside their flood-damaged home in N'Djamena, Chad.