Photos from yesky.com

Volunteers for the "Green Technology, Qomolangma Gathering" have come back to Beijing after 11-day environmental protection trip to Tibet.

They have visited Lhasa, Xigaze, Tingri, Tashizong Central Elementary School, Qomolangma Base Camp and Yamzhog Yumco to publicize the Green Olympics, Cultural Olympics and Tech Olympics.

Related report: 'Environment Protection Trip' volunteers set out