The senior Congress leader, known for his environmental activism, said he had tried to avoid the use of flex boards as it cause environment and health problems.
"But we were forced to use it as it was an easily available campaign material for reaching out to people. Now elections are over and it is my duty to remove such ecologically harmful campaign materials," Thomas a former Lok Sabha member told PTI.
Known for his environmental activism, Thomas was denied a ticket by the Congress to contest the 2014 Lok Sabha elections for strongly arguing for implementation of Madhav Gadgil Committee report on Western Ghats, tough the state government opposed it.
He had endorsed the Gadgil Committee report when he was representing Idukki seat in Lok Sabha during UPA-II rule.
Thomas dismissed exit polls projecting a win for LDF, saying all such predictions would be proved wrong and the ruling Congress-led UDF would get a comfortable majority.