Definition: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Input: The Stockholm Convention on Persistent Organic Pollutants , which took effect in 2004 , put a global ban on several persistent organic pollutants , and restricted DDT use to vector control .
Output:
The Stockholm Convention which took effect in 2004 , restricts the use of DDT to vector control .