A Practice Note tracking key Biden administration actions and initiatives on climate, energy, and environmental issues in 2021. This tracker includes executive orders, agency actions (including the Departments of Energy and the Interior), and related Congressional and judicial actions and decisions. This Note also tracks developments that occur in 2021 relating to the review and revocation of various rules and regulations promulgated under the Trump administration and Biden administration initiatives to tackle the climate crisis and transition the US towards more clean energy. This tracker is updated at the end of each month.