In recent days, the smog weather that almost enveloped the whole country for several days has brought great influence to people's lives and industrial and agricultural production. To ease the day,

Analysis of test questions: Holding the "Earth Hour" lights-out activity is conducive to energy conservation and emission reduction, A is correct; Wearing N95 professional mask when going out in foggy days is beneficial to reduce the inhalation of inhalable particles, B is correct; Strict requirements for all enterprises to meet the discharge standards are conducive to environmental protection, and C is correct; In order to reduce the impact of PM2.5 on the environment, families can reduce the use of private cars, but it is unrealistic to prohibit families from using private cars. So choose D.