Environmental monitoring characterizes and describes the state of the environment. Monitoring programs establish current status or baseline parameters. Results are reviewed, analyzed statistically, and published
Haze is atmospheric phenomenon obscuring visibility through suspended particles. Particles come from farming, traffic, industry, wind, volcanic activity and wildfires. Wet haze forms when particles act as condensation nuclei. Wet haze primarily occurs in warm season, covering thousands of kilometers
Seoul is South Korea's capital and largest city, with 9.6 million residents as of 2024. The Seoul Metropolitan Area is the world's sixth largest metropolitan economy. The city is located in northwest South Korea, bordered by eight mountains
Beijing is China's capital with over 22 million residents. World's most populous national capital and second largest city. Located in Northern China, surrounded by Hebei Province and Tianjin. Ranked 10th most important city in world by Knight Frank
AQI indicates current or forecasted air pollution levels. Government agencies develop AQI to communicate air quality to public. Children, elderly and those with health problems are first affected
Psychrometric charts visualize gas and vapor relationships. X-axis shows temperature readings in Fahrenheit or Celsius. Y-axis indicates moisture per pound or kilogram. Saturation curve connects X and Y axes at 100% humidity