The “Solve” program at MIT announces five global challenges in 2021, inviting anyone in the world to propose solutions to them. The 2021 challenges include one on resilient ecosystems. MIT Resilient Ecosystems Challenge seeks technology-based solutions that help communities restore, sustain, and benefit from resilient ecosystems. The winner receives a US$10 thousand grant. Additional prizes (from US$75 thousand to US$150 thousand) for solutions addressing specific challenges are available.