In response to the annual International Environmental Protection Festival - "World Environment Day" on June 5, Macao Environmental Protection Bureau will launch "2021 World Environment Day series activities", which will be supported by cities in Guangdong, Hong Kong and Macao. The activities include "all lights out, one hour","casual clothes, all energy saving", "know how to save electricity - 5% energy saving action", And the "2021 Guangdong Hong Kong Macao Great Bay District World Environment Day Carnival" held on June 5 to enhance the environmental awareness of residents and encourage energy conservation and emission reduction.