The WHO says it's the world's most comprehensive database on pollution.

世界卫生组织称这是世界上最全面的污染数据库。

The most comprehensive database covering American solar-power installations, for instance, is thought to miss around a fifth of the photovoltaic panels actually installed on the ground.

例如，覆盖美国太阳能装置最全面的数据库被认为遗漏了大约五分之一的实际安装在地面上的光伏电池板。