Sedimentary rocks—the most common rock type near the surface—are also the most common reservoirs for water because they contain the most space that can be filled with water.
沉积岩——地表附近最常见的岩石类型——也是最常见的储水层，因为它们可以装水的空间最多。
2
By far the most abundant type of groundwater is meteoric water; this is the groundwater that circulates as part of the water cycle.
到目前为止，最丰富的地下水资源是雨水；这是地下水在水循环中的一个环节。
3
“If you cut down more trees than you grow, you run out of trees,” writes Gilding.“If you put additional nitrogen into a water system, you change the type and quantity of life that water can support.