2. Air Quality Assessment in Populated Area, Houston Focused on NOx & SO2 Eon S. Lee

3. Order Outdoor Pollution Source Common Pollutants in Urban Area Population & NOx Distribution Annual NOx Concentration Annual SO 2 Concentration Annual NOx & SO 2 Concentration Conclusion

4. Outdoor Pollution Source Industrial Emission (NOx, SO 2 ) Transportation (NOx, SO 2 ) Incomplete Combustion

5. Common Pollutants in Urban Area A complex mixture including varying proportions of air, pollutants, humidity and allergens. Ozone, generated by reaction of NOx; NO 2 +O 2  NO +O 3 SO 2, Acid rain, Toxic (not focused) Heat Island Effect Occurs in the middle of Houston 2.1 million people exposed. Causes cancer and bronchial diseases

6. Population & NOx Distribution

7. NOx emission by year

8. SO 2 Emission by year

9. Annual NOx & SO 2 Concentration

10. Conclusion Overall NOx concentration is acceptable. Less considered for SO 2 concentration. Necessary to make air quality standards for consider building- concentrated area with large population/area ratio. Apply the heat island effect. Personal protection.

11. Any Question?