3. Cleaning Up Pollution on the Hudson River
The Hudson has suffered from many types of pollution - the picture shows the condition of the "Albany Pool" before sewage treatment plants were built to serve towns along the river. Raw sewage had starved the river of dissolved oxygen, harmed fish and rendered the water unsightly and malodorous. In the past four decades, the federal Clean Water Act, state bond acts, and local initiatives have greatly improved water quality in the river.