假设你是红星中学高三(1)班学生李华，针对北京雾霾频发的现象，你们班上周开展了一系列的宣传活动，请根据以下四幅图的先后顺序，为校刊“英文园地”写一篇短文，记述活动过程。
注意：1．词数不少于60。   2．短文开头已给出，不计人总词数。
提示词：雾霾 haze       社区 community

                                                        
                                                        
                                                        
                                                        
                                                        
                                                        
Haze hits Beijing frequently, which has caused widespread concern.