Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
사막화는 지구의 생태계에 심각한 영향을 미칩니다.samakhwaneun jiguuui saengtaegae simgakhan yeonghyangeul miknida.Desertification has a serious impact on the Earth's ecosystem.