Environment activists led by the Kheti Virasat Mission and the Bharti kisan Union on Friday said they would launch agitation and oppose every move of Punjab Government to promote BT maize seed in the state as genetically modified variries would take a toll on the environment. The activists also demanded that Chief Minister Parkash Singh Badal should explain on what basis his government had offered to introduce BT maize in the state to reduce the area under paddy cultivation.