有毒废物排放到河中引发了一场环境灾难。

The ___release of toxic waste into the river caused an environmental disaster.

科学家们正在监测工业基地温室气体的排放。

Scientists are monitoring the ___release of greenhouse gases from the industrial site.

严格的法律旨在减少车辆有害尾气的排放。

Strict laws aim to reduce the ___release of harmful exhaust fumes from vehicles.