1. Climate change: With global warming, extreme weather events occur frequently, including rainstorm, drought, flood and hurricane. These phenomena have a far-reaching impact on the environment and human life, so we are concerned about how to reduce greenhouse gas emissions and promote sustainable development and environmental protection.
2. Health problems: Health problems have always been the focus of people's attention, including obesity, depression, cancer and so on. These problems are closely related to people's lifestyle, eating habits and environmental factors. Therefore, we should pay attention to how to maintain a healthy lifestyle, improve people's health awareness, and prevent and control various health problems.