Sand and dust storms have a big impact on air quality and the air we breathe. On International Day of Clean Air for blue skies, collective action is needed to combat the growing transboundary problem.
一个识别重大甲烷泄漏的高科技系统在过去两年内向各国政府和企业发送了1200份通知，但根据联合国环境规划署（环境署）的最新数据，只有1%的通知得到了响应。