1. Source-oriented sampling is FEASIBLE? 1.1 Novel sampling method implemented successfully 1.2 Different PM samples attributable to different sources 1.3 Sufficient PM collected for toxicity studies Hypothesis: The toxicity of particles depends on their source 1. Some particle sources MORE TOXIC than others 1.1 Summer PM: metal-containing, BBQ and vehicular emissions 1.2 Winter PM: highly processed, vehicular emissions and nighttime mix 1.3 Ultrafine PM more toxic than submicron fine PM 2. Different particles TOXIC in DIFFERENT ways 3. Source-oriented regulations are FEASIBLE but further research is necessary.
展开▼
