Greta Thunberg (right), Climate Activist, speaks at the opening of the UN Climate Action Summit 2019. Credit: UN Photo/Cia Pak URBANA, Illinois, Jan 21 2021 (IPS) - On the first day, hours after inauguration of the new Biden-Harris administration, President Biden signed an Executive Order-rejoining the United States in the Paris Climate Accord. President Joe Biden is also expected to roll out an ambitious climate change agenda and initiatives to mitigate the crisis, shrink the nations carbon emissions, convene a U.S. climate summit, and give voices to vulnerable communities impacted by climate change. He has already unveiled a very competent climate change team and appointed John Kerry as the special climate change envoy.