Question

depleting chemicals
ions pose a threat to the ozone layer when
chlorine, which interacts with ozone molecules
cal reaction
break down thousands of ozone molecules
g lifespan of these chemicals and leads to
recognizing this, global efforts were
ozone - depleting substances
what characteristic of ozone - depleting chemicals make
them particularly dangerous to the ozone layer?
the long lifespan of the chemicals
their ability to block out the sun
the short lifespan of the chemicals

Explanation:

Ozone - depleting chemicals (like CFCs) have a long lifespan in the atmosphere. This long lifespan means they can remain in the stratosphere for a long time, continuously reacting with ozone molecules and depleting the ozone layer. The option "their ability to block out the sun" is incorrect as these chemicals don't block the sun. The option "the short lifespan of the chemicals" is wrong because a short lifespan would mean they don't stay long enough to cause significant ozone depletion. So the correct characteristic is the long lifespan of the chemicals.

Answer:

A. the long lifespan of the chemicals