This scenario begins with the planting of hyperaccumulating species in the target area, such as an abandoned mine or an irrigation pond contaminated by runoff.
这种情形始于在目标地区（如废弃矿井或被污水污染的灌溉池）种植超积累物种。
2
You’d reduce water use and end runoff by recycling water in a closed irrigation system.
人们还可以在封闭的灌溉系统中循环用水以减少用水量、避免径流造成土肥流失。
3
You'd reduce water use and end runoff by recycling water in a closed irrigation system.