Group 1 - The article discusses the impact of seasonal changes on human emotions, particularly focusing on the phenomenon of seasonal affective disorder (SAD) which can lead to symptoms similar to depression [1][2] - It highlights that high temperatures and humidity can hinder sweat evaporation, increasing perceived temperature by 3°C to 5°C, which places additional stress on the body's autonomic nervous system [1] - The article emphasizes the importance of recognizing seasonal affective disorder, especially for individuals who experience emotional disturbances during specific seasons, particularly autumn and winter [1][2] Group 2 - Symptoms of seasonal affective disorder include low mood, lack of pleasure, feelings of helplessness, decreased energy, and increased irritability, with a notable disruption in sleep-wake patterns [2] - The article notes that seasonal depression is not a milder form of depression; it has a higher tendency to recur, and severe symptoms warrant professional help for assessment and treatment [2] - Suggested treatments for seasonal affective disorder include light therapy, antidepressant medications, cognitive behavioral therapy, and lifestyle changes such as outdoor activities and regular exercise [3]