Prepare a short talk on the causes and prevention of bad breath, using the provided text. Ensure it is structured in two paragraphs and adheres to the word limit.

Here is the talk based on the provided passage, addressing the causes and prevention of bad breath, structured in two paragraphs and within the word limit.

Talk on Bad Breath: Causes and Prevention

Bad breath, or halitosis, is mainly caused by poor oral hygiene. When we don't brush and floss regularly, food particles and bacteria accumulate in our mouths, especially between teeth and gums. These bacteria then release sulfur-like chemicals, creating an unpleasant smell. Insufficient saliva, which normally helps cleanse the mouth, can also contribute to bad breath. Other factors include postnasal drip, tonsil stones, and consuming strong-smelling foods like garlic or onions.

Fortunately, bad breath is largely preventable. The most effective steps are brushing and flossing your teeth at least twice daily. Drinking plenty of water keeps your mouth hydrated and helps wash away bacteria. Regularly scraping your tongue can remove odor-causing bacteria. Chewing sugar-free gum also stimulates saliva production. If persistent bad breath continues despite good oral hygiene, it's crucial to consult a dentist for professional advice and treatment.