The United States is mandating climate-resilient designs for all infrastructure projects funded through the U.S. Trade and Development Agency (USTDA) in Papua New Guinea. This shift acknowledges PNG’s significant vulnerability to climate change impacts, including rising sea levels. The new policy integrates rigorous environmental planning as a core requirement for feasibility studies. The aim is to ensure projects are “bankable” – meaning they are sustainable and capable of withstanding future climate shocks. Technical training will also be provided alongside funding to support these resilient designs. This represents a significant change in US development aid strategy for the region, prioritizing long-term sustainability over initial cost. The move intends to safeguard infrastructure investments in PNG against the increasing risks posed by a changing climate.