The environment, experts say, most of the air pollution hazards may be in buildings. Earlier this year, when the world was locked down due to the COVID-19 pandemic, one benefit could be temporary: a drop in outdoor air pollution. From the United States, pollution levels have dropped dramatically, however, as countries back open again Pollution has returned to pre-epidemic levels.

อ่านต่อได้ที่ : โรงเรียนบ้านมะขามเอน นานาสาระ : สภาพแวดล้อม