The big problem in the Columbia River no one is talking about - The Columbian

Colombia: Pablo Escobar's hippo population is a huge problem – DW – 05/14/2023

With a treaty negotiation looming, the future of the Columbia River hangs in the balance - The Globe and Mail

In Colombia, Escobar's hippos spawn another problem: Wildlife trafficking

Canada, U.S. negotiate future of Columbia River in Seattle this week

Why the entire world now depends on the Columbia River - Columbia Insight

Why are there no major cities on Colombia's on west coast? : r/geography

Colombia, not Columbia: The things we get wrong about the country

Columbian Exchange - Bill of Rights Institute

Columbia River Treaty

Columbia River - Wikipedia

Columbia River Treaty negotiations progressing to agreement-in-principle - The Nelson Daily