A committee of MPs has warned that developed countries must change their patterns of consumption in order to prevent deforestation and tackle climate change.

An activist from the Yanomami people in the Amazon is to tell MPs at the Houses of Parliament that the world’s rainforests cannot be put under further pressure from multinational companies or illegal loggers and miners.

The ecological destruction of the Amazon region poses a serious threat to the planet, former Brazilian environmental minister Marina Silva has warned as the World Social Forum begins.