The document discusses environmentally sound technologies (ESTs) as defined by Agenda 21. It provides background on the International Environmental Technology Centre (IETC) and its mandate to promote ESTs based on Agenda 21. ESTs are defined as technologies that protect the environment, are less polluting, use resources sustainably, maximize waste recycling, and handle residual waste responsibly. The document outlines criteria for assessing technologies and identifying ESTs, and discusses the role of ESTs in areas like forest governance and sustainable development.