A colorless gas that is a screen for ultraviolet radiation. Also known by the chemical formula O₃.

The EPA in 2015 barred the use of ____ in four major economic sectors: ________, air conditioning for new cars, retail food refrigeration and foam blowing.

Sunburn is a burn from the _________ of UV light, resulting in reddish skin.

The act of spreading outward from a central source.

Air pollution that is a mixture of smoke and fog.

A cloud of solid or liquid particles in a gas usually contained in a spray can.

The seasonal _________ of the Antarctic ozone, a highly reactive molecule of oxygen called O3, was first reported in the journal Nature in 1985.

The act of decreasing something markedly.

The ozone layer protects us from ___________ light rays from the Sun.

Scientists say global warming is partly caused by the hole in the __________ layer above Antarctica, compounded with rising greenhouse gas levels.

The US is proposing that growth in __________________ use be “frozen” at 2021 levels and then scaled down so that it is largely eliminated by 2050.