id	keyword
easat-7677	air
easat-7677	plants
easat-7677	purifiers
easat-7677	vol
easat-7677	dust
easat-7677	pm2.5
easat-7677	pm10
easat-7677	leaf
easat-7677	quality
easat-7677	area
easat-7677	science
easat-7677	technology
easat-7677	pollution
easat-7677	removal