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Port Moresby, the capital of Papua New Guinea, sits within a tropical savannah climate characterized by high temperatures, seasonal rainfall, prolonged dry periods, and rapid urban expansion. As the city grows, it faces increasing environmental challenges such as heat stress, air pollution, soil erosion, flooding during the wet season, and loss of biodiversity. Urban forestry—the strategic planning, planting, and management of trees and green spaces in cities—offers a powerful, culturally adaptable, and environmentally sound approach to greening Port Moresby while improving the quality of life for its residents.

Urban forestry in a tropical savannah city must begin with climate-sensitive tree selection. Native and drought-tolerant species such as Albizia, Terminalia, Casuarina, and fruit-bearing trees like mango and breadfruit are well adapted to Port Moresby’s conditions. These species can survive dry seasons, stabilize soils, and provide shade without excessive water demands. Using indigenous trees also supports local ecosystems, preserves traditional knowledge, and enhances biodiversity by providing habitat for birds and insects.

One of the most immediate benefits of urban forestry in Port Moresby is heat reduction. The city experiences intense solar radiation, amplified by concrete surfaces and limited vegetation. Strategic planting of street trees, shade corridors, and parklands can significantly lower surface and air temperatures through evapotranspiration and shading. Tree-lined streets not only cool neighbourhoods but also improve walkability, encouraging active transport and reducing dependence on vehicles. This is especially important in informal settlements where access to air conditioning is limited and residents are most vulnerable to heat-related health risks.

Urban forestry can also play a crucial role in water management. Port Moresby faces seasonal flooding due to heavy rains and inadequate drainage, followed by water scarcity during dry months. Trees help regulate this cycle by intercepting rainfall, increasing infiltration, and reducing runoff. Green buffers along waterways, mangrove restoration in coastal zones, and reforestation of hillsides can reduce erosion, protect infrastructure, and improve water quality. In this way, urban forestry acts as natural infrastructure, often at lower cost and with greater resilience than purely engineered solutions.

Beyond environmental benefits, urban forestry contributes to social and economic development. Well-designed green spaces provide areas for recreation, cultural activities, and community gatherings, strengthening social cohesion. In Port Moresby, community-led tree planting programs can empower local residents, create employment, and foster a sense of ownership over public spaces. Fruit trees and agroforestry systems integrated into urban areas can enhance food security and provide supplementary income, particularly in peri-urban communities.

Education and governance are essential to the success of urban forestry initiatives. Schools can integrate tree planting and environmental stewardship into curricula, nurturing a generation that values green cities. Municipal authorities must develop clear urban forestry policies, including tree protection laws, maintenance plans, and long-term funding mechanisms. Partnerships with customary landowners, NGOs, and regional organizations are especially important in Port Moresby, where land tenure systems are complex and community consent is vital.

In conclusion, greening Port Moresby through urban forestry is not merely an aesthetic endeavour but a holistic strategy for climate resilience, public health, and sustainable urban development. By prioritizing native species, integrating trees into infrastructure planning, engaging communities, and aligning policy with ecological realities, Port Moresby can transform its tropical savannah landscape into a greener, cooler, and more liveable city. Urban forestry offers the city a path that respects its environment, culture, and future growth, ensuring that development and nature thrive together.