The impact of airborne toxicants on human health can vary depending on factors such as the type of toxicant, concentration, and duration of exposure. Short-term exposure can lead to acute health effects such as respiratory irritation, headaches, and dizziness. Long-term exposure can have more severe consequences, including chronic respiratory diseases, cardiovascular problems, and cancer. Vulnerable populations, such as children, the elderly, and individuals with pre-existing health conditions, are particularly at risk.