02.02.2021 among students of grades 9-11 through the ZOOM platform "nature protection is the responsibility of each of us". An educational hour was held on the topic:" black spots of monitoring the quality of the environment".

Date: 2021-02-03 15:14:05

02.02.2021 among students of grades 9-11 through the ZOOM platform "nature protection is the responsibility of each of us". An educational hour was held on the topic:" black spots of monitoring the quality of the environment".