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Trump ’s zeal to roll back all Obama environmental protections continues tomorrow when {@U.S. EPA@} rescinds regulations that reduce the amount of toxic chemicals in the ash produced by coal plants that leaks into rivers and groundwater . {{USERNAME}} {{URL}} {{USERNAME}}
 Trump, Obama, environmental protections, U.S. EPA
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: group, creative work, person, event, product, location, corporation 
Text: {0} 
Answer:
 Trump, Obama, environmental protections, U.S. EPA