What is the purpose of buffer zones in aerial spraying?

Buffer zones play a critical role in aerial spraying by establishing specific areas where no application of chemicals occurs, which helps minimize the risk of chemical drift. This drift can lead to unintended exposure of neighboring properties, crops, or sensitive environments like waterways. By implementing buffer zones, applicators can significantly reduce the likelihood of harmful effects on non-target areas and organisms, thereby protecting public health and the environment.

In contrast, while the other options may touch on aspects of aerial spraying, they do not capture the primary function of buffer zones. For instance, creating safer zones for aircraft and ensuring easier cleanup, while important, do not directly relate to the main goal of reducing drift and safeguarding adjacent land and water resources. Additionally, efficiency in spraying is generally improved through proper techniques and planning rather than the establishment of buffer zones. Thus, the most accurate depiction of the purpose of buffer zones is their role in protecting against chemical drift.