RT null T1 Guidelines on Green Houses of Worship A1 United Nations Environment Programme, K1 building K1 green building K1 energy resource K1 electricity K1 sustainable energy K1 religious place YR 2020 FD 2020 LK https://wedocs.unep.org/handle/20.500.11822/33262 UL https://wedocs.unep.org/handle/20.500.11822/33262 NO Houses of worship serve as the spiritual centre for communities where they can practice religious rituals. Some estimates indicate that there are around 37 million churches, 4 million mosques, 20 thousand synagogues and hundreds of millions of temples in existence today. These places can become models of sustainability, engaging in eco-friendly practices of worship, sustainably designed buildings, and teaching an environmentally-friendly lifestyle within communities. This publication has been developed to showcase some successful examples from religions around the world on their greening efforts of their houses of worship and provide some useful references and tips to build or transform a house of worship to be green and contribute to achieving sustainability. DS UN Environment Document Repository RD Sep 16, 2026