[单选题]
2. In Botswana, forest cover decreased from 18.8jjyzu()l sw1k6a1kd /) /wc26wrjiwxh 9;6s llhfk 0ucb*h 6r million hectares to 15.3 million hectares between 1990 and 2020. Calculate the percentage /6ww9*6h x )r ;jhlkfsu6hr20lwc bicloss in forest cover during this period.
