Which environmental planning tool assesses cumulative environmental impacts of a project?

• A. Cumulative impact assessment as part of an environmental impact assessment
• B. Single-project environmental risk assessment
• C. Noise mapping and acoustical analysis
• D. Air quality dispersion modeling

Answer: (A)

The main idea is to study how a project adds to environmental stresses already in the landscape by looking at effects in combination with other existing or planned activities. This is done through a cumulative impact assessment that is integrated into an environmental impact assessment process. By assessing cumulative effects, you consider regional context, background conditions, and interactions among multiple stressors over time and space, which helps identify whether the project’s combined impacts are significant and what mitigations are needed beyond addressing the project in isolation.

Single-project risk assessments focus on hazards from one project alone, not how it interacts with other sources. Noise mapping or acoustical analysis concentrates on sound levels from specific sources, which can be part of an assessment but doesn’t inherently evaluate cumulative impacts across multiple projects. Air quality dispersion modeling analyzes how pollutants move and dilute, but without the broader cumulative context across other sources and planned developments, it doesn’t fully capture cumulative environmental effects.