The Environmental Effects Assessment Panel assesses the various effects of ozone layer depletion. It consists of members who are scientists working in photobiology and photochemistry, mainly in universities and research institutes. The Panel members write the different chapters, sometimes helped by co-authors for special topics. The chapter authors review each other's chapters, and the Panel takes responsibility for the entire assessment. A draft assessment is sent out to external scientific reviewers all over the world. Between major assessments, the Panel meets at least once a year and informs the Parties about new developments.