CLEAN : Children return to school in Donetsk to the sound of mortar fire

The video tutorial covers various topics, starting with an introduction to credit unions and the confusion surrounding them. It then moves on to discuss school and national issues, followed by an exploration of associates and ideas. The tutorial also delves into special zones and dismissals, and concludes with a focus on public hygiene and database management.

In what way does the speaker refer to 'public hygiene' in the context of their discussion?

What does the phrase 'Negative three will not DDT by yards' suggest about the speaker's perspective?