1.   In a series of earlier technical meetings, persistent organic pollutants had, in effect, been tried and convicted.

2.   Known as persistent organic pollutants, they spread quickly, break down slowly, and pose serious health hazards across the globe.

3.   On the environment, the official added, one could measure the levels of persistent organic pollutants and whether loans made to reduce them were having an effect.

4.   Once introduced into the environment it can take years, even decades, for persistent organic pollutants to break down to less damaging forms.

5.   Persistent organic pollutants are among the most dangerous man-made substances released into the environment each year.

6.   The treaty will ban most persistent organic pollutants immediately.

7.   Persistent organic pollutants are highly toxic manmade chemicals that include pesticides such as DDT, toxaphene, chlordane and industrial chemicals products like PCBs.

8.   Persistent organic pollutants are highly toxic manmade chemicals that include pesticides such as DDT, toxaphene, chlordane and industrial products such as PCBs.

9.   Persistent organic pollutants include pesticides such as DDT, toxaphene, chlordane and industrial chemicals products like PCBs.

10.   A naturally occurring metal, mercury is a persistent pollutant that accumulates in fish and becomes more concentrated as it moves up the food chain.