State if the statement is true or false:

Oxygen combines with nascent oxygen to form ozone.

The ozone layer is defined as "the region in the Earth's stratosphere that contains high concentrations of ozone and protects the Earth from the sun's harmful ultraviolet radiation." Thus, the ozone layer acts as a shield for the Earth.

Now, Nascent oxygen refers to an oxygen atom that exists as a monoatomic, i.e. $\mathrm{O}$. 

Ozone - ${\mathrm{O}}_3$, is an allotropic molecular form of oxygen containing three oxygen atoms.

Ozone is formed when ultraviolet light falls on oxygen, which breaks it down into two atomic oxygens, i.e. nascent oxygen (represented by O). 

The resulting oxygen then combines with atmospheric oxygen to form ozone (step 2 of the reaction). The nascent oxygen combines with atmospheric oxygen to form ozone.

${\text{O+O}}_2{\text{→O}}_3$

Hence, the given statement is TRUE.