Brazilian President Luiz Inacio Lula da Silva is set to lead tributes to the Amazon rubber-tapper Chico Mendes on the 20th anniversary of his murder.

Mr Mendes is seen as a pioneer of the environmental movement who mobilised local forest communities to stop the advance of loggers and ranchers.

He was shot dead outside his home in the state of Acre on 22 December 1988.

His legacy was the creation of a network of reserves where people can make a living from the forest.