Youth for Environmental Sanity(簡稱YES!)由年輕的發起者們和12—25歲的年輕人一起參加暑期培訓露營，還組織國際學生環境會議。YES成立於1990年，它的宗旨是組織、支援和鼓勵年輕人為公正、和平、環保的社會而努力。YES開展校園講演、研討會、露營和學生組織管理培訓等專案。

YES! is a nonprofit organization that connects, inspires and collaborates with changemakers to join forces for thriving, just and sustainable ways of life for all. We work at the meeting point of internal, interpersonal, and systemic transformation.