UNESCO is the United Nations Educational, Scientific and Cultural Organization.

ICOMOS is the International Council on Monuments and Sites.

ICCROM is the International Centre for the Study of the Preservation and Restoration of Cultural Property.

WHC is the World Heritage Committee.

The purpose of the World Heritage Convention is to protect the world's cultural and natural heritage.

There are over 1,000 World Heritage Sites.

The Pyramids of Giza are the oldest World Heritage Site.

The Antarctic Ice Sheet is the largest World Heritage Site.

The Great Wall of China is the most visited World Heritage Site.

The Great Barrier Reef is the most endangered World Heritage Site.

The main threats to World Heritage Sites are climate change, pollution, tourism, and war and conflict.

To protect World Heritage Sites, we can reduce greenhouse gas emissions, invest in renewable energy, promote sustainable tourism, and protect cultural and natural heritage laws.

UNESCO's role in protecting World Heritage Sites includes identifying and listing World Heritage Sites, providing financial and technical assistance to countries for the conservation of World Heritage Sites, monitoring the state of conservation of World Heritage Sites, and raising awareness of the importance of World Heritage Sites.

ICOMOS's role in protecting World Heritage Sites includes providing technical advice to UNESCO on the conservation of World Heritage Sites, developing and promoting international standards for the conservation of cultural heritage, training professionals in the conservation of cultural heritage, and raising awareness of the importance of cultural heritage.

ICCROM's role in protecting World Heritage Sites includes providing training and technical assistance to countries for the conservation of cultural heritage, developing and promoting international standards for the conservation of cultural heritage, conducting research on the conservation of cultural heritage, and raising awareness of the importance of cultural heritage.