China announced on Friday that it was banning all commerce in ivory by the end of 2017, a move that would shut down the world’s largest ivory market and could deal a critical blow to the practice of elephant poaching in Africa.

The decision by China follows years of growing international and domestic pressure and gives wildlife protection advocates hope that the threatened extinction of certain elephant populations in Africa can be averted.

“China’s announcement is a game changer for elephant conservation,” Carter Roberts, the president and chief executive of the World Wildlife Fund, said in a written statement. “With the United States also ending its domestic ivory trade earlier this year, two of the largest ivory markets have taken action that will reverberate around the world.”

According to some estimates, more than 100,000 elephants have been wiped out in Africa over the past 10 years in a ruthless scramble for ivory driven by Chinese demand. Some Chinese investors call ivory “white gold,” while carvers and collectors call it the “organic gemstone.”