True or false: The occurrence of ozone at ground level is considered positive.

The occurrence of ozone at ground level is considered negative due to its harmful effects on human health and the environment. Ground-level ozone is a result of chemical reactions between sunlight, nitrogen oxides, and volatile organic compounds. It is a key component of smog and can lead to respiratory problems, decreased lung function, and other health issues.

In contrast, ozone high in the atmosphere (the stratosphere) acts as a protective layer that absorbs the majority of the sun's harmful ultraviolet radiation, making it beneficial. The confusion arises because there are two different contexts in which ozone is discussed: the stratospheric ozone layer is beneficial, while ground-level ozone is detrimental. Consequently, considering the negative health impacts and environmental risks associated with ground-level ozone makes this statement false.