This week we discuss Jeremy Lewin’s departure from the U.S. State Department’s foreign aid bureau to the White House. His transition to the National Security Council ends a controversial leadership marked by the retreat of the U.S. from its long-held role as the world’s leading bilateral donor. He is expected to be replaced by Andrew Veprek, who has pushed immigration and refugee restrictions at the State Department.

As the United Nations continues to face budgetary constraints, we also analyze the potential merger of two major U.N. development agencies: the U.N. Development Programme, or UNDP, and UNOPS. While Secretary-General António Guterres sees this ambitious development reform as a way to overcome a yawning funding gap, UNDP chief Alexander De Croo and UNOPS Executive Director Jorge Moreira da Silva have butted heads over their vastly different visions for the future.

During the conversation we also discuss our key takeaways from the Hamburg Sustainability Conference, including a new initiative that is designed to tackle debt, trade, climate finance, and multilateral reform to help reset the terms of global cooperation.

To dig into these stories and others, Senior Reporter Adva Saldinger sits down with U.N. correspondent Colum Lynch and reporter Jesse Chase-Lubitz for the latest episode of our weekly podcast series.

How can climate and nature investments move from ambition to action?

In the sponsored segment of the episode, recorded live at Devex Impact House during London Climate Action Week, Kate Warren, Executive Editor and Executive Vice President at Devex, speaks with Waqas Batley, Senior Director, Conservation and Climate Finance Policy at The Nature Conservancy.

Together, they explore how policy advocacy can help countries develop the plans, financial roadmaps, and regulatory systems needed to attract investment in nature and climate. The conversation looks at why nature should be understood as economic infrastructure, what finance ministries can do to send clearer signals to investors, and how approaches such as country platforms can help turn national climate and biodiversity priorities into investable pipelines.

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