Wildlife trafficking is an illegal trade of wild animals or plants by human beings in exchange for cash, food or other objects. This kind of illegal activity involves the sale of various animal or plant resources, such as animal skins, ivory, bones and timber. There are many reasons why illegal wildlife activities take place. For example, people living in poor rural areas need wild meat to ＿＿（27）＿＿ livelihoods. There are also private individuals who collect wildlife specimens for personal interest. The increased global demand for wildlife products has also made wildlife trade a highly profitable business, with its estimated value ＿＿（28）＿＿ up to hundreds of billions US dollars every year. ＿＿（29）＿＿ its high profitability, however, illegal wildlife trafficking is a serious conservation problem. As a critical challenge to the local ecosystem, wildlife trafficking may cause ＿＿（30）＿＿ that damages biodiversity and sustainability of natural resources. It is also a direct threat to the populations of protected or endangered animals. Wildlife trafficking is thus a critical conservation concern that needs to be addressed ＿＿（31）＿＿ . As wildlife trafficking ＿＿（32）＿＿ by the demand for animal or plant resources, one powerful way that truly gets to the source of the problem is that individuals or organizations should stop buying illegal wildlife products. People should also help track illegal wildlife trade and collect evidence ＿＿（33）＿＿ illegal wildlife activities. Only by working together will we be able to crash trafficking networks and protect our global wildlife resources.