Treatment of non biodegradable toxic organic pollutants by green chemical process is a very active field in recent years.

近年来利用绿色化学过程来处理难生物降解有机物是一个非常活跃的研究课题。

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The research advancement and characteristics of various chemical technologies of treating toxic organic pollutants are summarized. The photochemical oxidative method is detailedly discussed.

简介了有毒有机污染废水的各种化学法处理技术的特点及研究进展概况，其中对光化学氧化法作了较详细的评述。

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Putting the cart before the horse, the EPA issued preliminary clean up goals for dioxin on December 31, 2009 before the agency had completed a new risk assessment on the chemical, widely perceived as one of most toxic environmental pollutants (the assessment is due by the end of this year).

FORBES: Is The EPA About To Shut Down Urban Renewal Across The U.S.?