Exclusion zone (green belt) radius around hazardous chemical industries What is the typical radius prescribed for an exclusion zone with a protective green belt where public access is restricted around hazardous/polluting chemical facilities?

Introduction / Context:
Land-use planning and buffer zoning reduce public exposure to accidental releases, routine emissions, and nuisance impacts (noise, odour). Many siting guidelines recommend an exclusion zone—often with a planted green belt—around hazardous or highly polluting chemical facilities.

Given Data / Assumptions:

• The question asks for a commonly cited radial distance for general MCQ purposes.
• Exact regulatory values can vary by country, hazard category, and risk assessment.
• We select a standard planning benchmark used in conventional exam settings.

Concept / Approach:
A 1000 m (1 km) exclusion/green belt buffer is a widely referenced planning value in many teaching texts for hazardous installations, providing dispersion distance, visual screening, and land-use separation. While site-specific quantitative risk assessment may refine this distance, the 1 km figure is the canonical single-choice answer.

Step-by-Step Solution:

Verification / Alternative check:
Teaching materials and example siting problems often apply 1 km buffers before more detailed risk-based calculations.

Why Other Options Are Wrong:

Common Pitfalls:
Treating the buffer as a universal legal requirement; in practice, risk-based, topography, and meteorology-specific evaluations refine distances.

Final Answer:
1000