synergistic effect of toxic substances(1. A state in which the combined effect of two or more substances is greater than the sum of the separate effects. 2. An effect whereby two toxic substance together have more of an impact than anticipated)
public-private partnership(A joint venture between corporations and government or between community members and government or business beyond the course of normal interaction)
continuous load(The amount or quantity of polluting material found in a transporting agent that flows at a steady rate, in contrast to a sudden or dramatic influx)