https://ieltsfever.org/oxygen-is-getting-frail-day-by-day-it-is-difficult-to-breathe-the-contaminated-air-what-are-the-reasons-for-this-serious-problemgive-some-solutions-to-eradicate-it/
Oxygen is getting frail day by day. it is difficult to breathe the contaminated air.what are the reasons for this serious problem?give some solutions to eradicate it.