Problem: What are some of the main findings of the Intergovernmental Panel for Climate Change (IPCC) report of 2021? Choose all that apply. a. It's unequivocal that human influence has warmed the atmosphere, ocean and land b. Global climate models need further development to be able to simulate the effect of atmospheric GHG in the climate. c. Following a sharp decrease in the late 20th century, Arctic sea ice area has recovered in the 2000s. d. The scale of recent changes are unprecedented over many thousands of years. e. Human-induced climate change is already affecting climate extremes.