Protesters will gather outside the Indian high commission in Canberra on Saturday as the campaign to stop Adani's Carmichael mine continues.
Queensland's environment department on Thursday signed off on the company's plan to manage groundwater on and around its Galilee Basin mine site - the final approval the company needs to begin construction.
Former Australian Greens leader Bob Brown is expected to join the peaceful demonstration to "highlight the Adani company's appalling record of environmental destruction and corruption overseas".
A vigil is also expected to be held outside India's consulate general in Sydney.
Australian Associated Press