World Ozone Day: why protecting Earth's shield layer matters
On World Ozone Day, a look at why the ozone layer matters, the history of the Montreal Protocol, and steps needed to protect it.
Nature has built a powerful protective layer around the Earth, known as the ozone layer. Found in the stratosphere, it stops dangerous ultraviolet (UV) rays from the sun from reaching the Earth's surface directly. Without this layer, life on Earth would itself be at risk.
This is why September 16 is observed every year as International Day for the Preservation of the Ozone Layer, or World Ozone Day. Its purpose is to protect the ozone layer, spread awareness of the damage to it, and encourage concrete steps to maintain environmental balance.
In terms of history, in the closing decades of the twentieth century scientists warned of a growing hole in the ozone layer and its steady depletion. It was established that certain man-made chemicals, especially chlorofluorocarbons (CFCs), halons and other ozone-depleting substances, were seriously damaging the layer. To tackle this global crisis, an international meeting was called in Montreal, Canada, on September 16, 1987. At this meeting, many countries around the world signed the historic Montreal Protocol agreement to halt the production and use of chemicals that harm the ozone layer.
To mark this agreement and to keep environmental awareness alive worldwide, the United Nations General Assembly passed a resolution in 1994 declaring September 16 as the International Day for the Preservation of the Ozone Layer. Since then, the day has been marked every year in countries across the world through various programmes.
Depletion of the ozone layer allows the sun's ultraviolet rays to reach the Earth directly. Direct exposure to these rays can cause serious illnesses in humans, including skin cancer, cataracts and weakened immunity. The effects are not limited to human health; agriculture, plants and marine life also suffer. Plankton found in the ocean are destroyed, disrupting the marine food chain and also reducing crop yields.
World Ozone Day is not merely a day for ceremonial events, but carries a message to actually act. A complete ban on plastic, large-scale tree planting, use of public transport, and a focus on green and clean energy are the main remedies. Using improved eco-friendly technology in home air conditioners and refrigerators is equally important. Only when every citizen and government together put green initiatives into practice can a safe and healthy Earth be left for the next generation.
