Bas Eickhout is a member of the European Parliament for The Greens/EFA. In addition, he is a member of the Committee on the Environment, Public Health and Food Safety and a substitute member of the Committee on Economic and Monetary Affairs and the Committee on Budgetary Control. He is also a member of the Delegation for relations with the People's Republic of China and a substitute member of the Delegation for relations with the United States. Eickhout is delegation leader of the Dutch Greens in the Parliament.
He worked on several projects which had to do with international environmental problems, such as climate change, agriculture, land-use and biofuels. He co-authored the IPCC report on climate change which received the 2007 Nobel Peace Prize.