Amidst the rising challenges of climate change, another study has released key findings. There has been a resurgence in global emissions of several ozone-destroying chemicals that were banned worldwide in 2010, according to a study by an international team of researchers from the UK, US, Switzerland, Australia, and Germany.

Chlorofluorocarbons or CFCs -- known to destroy the Earth's protective ozone layer -- were once widely used in the manufacture of hundreds of products including aerosol sprays, such as blowing agents for foams and packing materials, solvents, and in refrigeration.