Using complete sentences, describe what causes the urban heat island effect. Identify two problems associated with urban heat islands and at least one solution to the issue.

20 points! read the excerpt and then respond to the question: "hay-bunau-varilla treaty (panama canal treaty); november 18, 1903 the united states of america and the republic of panama being desirous to insure the construction of a ship canal across the isthmus of panama to connect the atlantic and pacific oceans, the congress of the united states of america having passed an act approved june 28, the president of the united states is authorized to aquire within a reasonable time the control of the necessary territory of the republic of columbia, and the sovereignty of such territory being actually vested in the republic of panama, the high contacting parties have resolved for that purpose to conclude a convention." 1. how does this document illustrate us foreign policy of imperialism?