Mountains
Mountains are among the most vital ecosystems on Earth, providing essential resources and services that sustain both local communities and the global population. They cover nearly one-quarter of the planet’s land surface and are home to about 10% of the world’s people, while indirectly supporting billions more through the resources they provide. Mountains are rich in biodiversity, cultural heritage, water resources, and natural materials such as minerals, forests, and agricultural products. At the same time, they are fragile ecosystems that face significant environmental and socio-economic challenges.
The 2030 Agenda for Sustainable Development recognizes the importance of mountains through Sustainable Development Goal 15 (SDG 15), which aims to protect, restore, and promote the sustainable use of terrestrial ecosystems. Target 15.1 explicitly mentions mountains as ecosystems that must be conserved, restored, and used sustainably in line with international agreements. This reflects the global acknowledgment that mountains are not only vital to local livelihoods but also crucial to the survival of ecosystems far beyond their boundaries, particularly through their role in regulating water cycles and providing freshwater to a large share of the global population.
Mountains play a central role in providing water resources. They are often referred to as “water towers” of the world because rivers originating in mountain regions supply water for drinking, agriculture, hydropower, and industry. The outcome document of the Rio+20 Conference – “The Future We Want” (2012) emphasized this critical function, highlighting that mountain ecosystems provide water resources to a large portion of the global population. The document also acknowledged mountains as homes to indigenous peoples and local communities whose knowledge and traditions are closely tied to the sustainable management of these environments. However, it warned that mountain ecosystems are highly vulnerable to climate change, deforestation, land use changes, and natural disasters, which can degrade their capacity to provide these essential services.
Historically, the international community has paid special attention to mountain development. Chapter 13 of Agenda 21, adopted at the Rio Earth Summit in 1992, focused specifically on “Managing Fragile Ecosystems: Sustainable Mountain Development.” It stressed that mountains are important sources of water, energy, biodiversity, and other resources, while also noting that mountain ecosystems were rapidly changing due to environmental pressures. To address these concerns, Agenda 21 called for strengthening knowledge of mountain ecology, promoting integrated watershed management, and supporting alternative livelihood opportunities for mountain communities.
Following this, the importance of mountains was further reinforced in 1997 at the third session of the Commission on Sustainable Development (CSD-3), and in 2002 when the UN General Assembly declared the International Year of Mountains. This initiative aimed to raise global awareness about the need to conserve and sustainably develop mountain regions. The same year, the UN also established International Mountain Day on 11 December, celebrated annually to promote action and highlight the role of mountains in global well-being.
Mountains are biodiversity hotspots that host unique ecosystems and species found nowhere else on Earth. The variation in altitude, climate, and terrain creates highly diverse habitats that support both flora and fauna. These ecosystems provide essential services such as carbon storage, soil stabilization, and pollination, making them critical for environmental stability. However, mountain biodiversity is increasingly threatened by habitat loss, deforestation, land degradation, and climate change. Melting glaciers, shifting vegetation zones, and rising temperatures are altering fragile ecosystems and placing rare species at risk of extinction.
Preserving mountain biodiversity is vital for human well-being as well. Many medicinal plants, crops, and forest products originate in mountain regions, contributing to global food security and health. Sustainable forest management, conservation of species, and restoration of degraded areas are crucial strategies for protecting mountain biodiversity. These actions not only safeguard natural resources but also maintain the ecological balance necessary for the survival of communities in both mountain and lowland areas.
Mountains are home to millions of indigenous peoples and traditional communities whose cultures, knowledge systems, and ways of life are deeply connected to their environment. These communities often act as custodians of the land, preserving biodiversity and practicing sustainable resource management. Traditional farming, rotational grazing, and herbal medicine are examples of practices that sustain both people and ecosystems while maintaining cultural heritage.
Yet, mountain communities are among the most vulnerable populations. They face poverty, limited access to education and healthcare, restricted infrastructure, and in many cases, marginalization from national development policies. Climate change and environmental degradation further threaten their livelihoods, increasing risks of food insecurity, displacement, and loss of cultural identity. Strengthening the resilience of mountain communities requires inclusive policies that promote economic opportunities, preserve traditional knowledge, and ensure equal participation in decision-making processes. International cooperation is essential to support these communities and to integrate mountain-specific priorities into national and global development agendas.
Despite their challenges, mountains remain vital lifelines for humanity and the planet. They provide freshwater, energy, biodiversity, and cultural richness, making them indispensable for sustainable development. Protecting and sustainably managing mountain ecosystems is not only a local issue but a global responsibility. Governments, organizations, and communities must work together to adopt mountain-specific strategies, strengthen conservation efforts, and promote sustainable livelihoods for mountain populations.
By integrating mountain development into global action plans and aligning with SDG 15: Life on Land, the world can ensure that mountains continue to provide their invaluable resources for generations to come. Safeguarding mountains is, ultimately, safeguarding life itself.