The United Nations estimated material damage from the revolutionary war to be US$480 million. The FSLN took over a nation plagued by malnutrition, disease, and pesticide contaminations. Lake Managua was considered dead because of decades of pesticide runoff, toxic chemical pollution from lakeside factories, and untreated sewage. Soil erosion and dust storms were also a problem in Nicaragua at the time due to deforestation. To tackle these crises, the FSLN created the Nicaraguan Institute of Natural Resources and the Environment. It was created 10 years after the National Environmental Policy Act of 1969 in the United States.