Brazilian unionist and environmental activist Chico Mendes was murdered at his home in Xapuri.

A trade union or labor union, often simply referred to as a union, is an organization of workers whose purpose is to maintain or improve the conditions of their employment, such as attaining better wages and benefits, improving working conditions, improving safety standards, establishing complaint procedures, developing rules governing status of employees and protecting and increasing the bargaining power of workers.

Environmentalism is a broad philosophy, ideology, and social movement about supporting life, habitats, and surroundings. While environmentalism focuses more on the environmental and nature-related aspects of green ideology and politics, ecologism combines the ideology of social ecology and environmentalism. Ecologism is more commonly used in continental European languages, while environmentalism is more commonly used in English but the words have slightly different connotations.

Francisco Alves Mendes Filho, better known as Chico Mendes, was a Brazilian rubber tapper, trade union leader, and environmentalist. He fought to preserve the Amazon rainforest, and advocated for the human rights of Brazilian peasants and Indigenous people. He was assassinated by a rancher on 22 December 1988. The Chico Mendes Institute for Biodiversity Conservation, a body under the jurisdiction of the Brazilian Ministry of the Environment, is named in his honor.

Xapuri is a municipality located in the southeast of the Brazilian state of Acre. It was the scene of an early bloodless victory during the war to make Acre independent of Bolivia. The town is known as the birthplace of the rubber tapper and environmentalist Chico Mendes and of the surgeon and professor Adib Jatene.