Which activities would have the greatest impact on the amount of dirt oil and other contaminants added to the streams and lakes near a large urban area?

The activities with the greatest impact on contaminants in streams and lakes near large urban areas include stormwater runoff from impervious surfaces, such as roads and parking lots, which can carry oil, heavy metals, and debris. Industrial discharges and wastewater from treatment plants also contribute significantly to pollution. Additionally, improper waste disposal and the use of fertilizers and pesticides in landscaping can lead to nutrient runoff, further degrading water quality. Implementing green infrastructure and improved waste management practices can help mitigate these impacts.