noun
green coverage ratio; vegetation cover rate
Technical term used in urban planning, environmental assessment, and geography to quantify the proportion of an area covered by vegetation (trees, grass, etc.).
この都市の緑被率は年々低下している。
The green coverage ratio of this city is declining year by year.
緑被率を高めるために屋上緑化が進められている。
Rooftop greening is being promoted to increase the vegetation cover rate.
Compound of 緑 (ryoku, 'green') + 被 (hi, 'cover') + 率 (ritsu, 'rate'). A modern technical term with no historical depth.