Brazil's position for the upcoming UN Conference on Climate Change in Copenhagen should go further and support a global emissions goal, a consultant of the Brazilian Ministry of Environment said Thursday.

Brazil's position will be set next week by President Luiz Inacio Lula da Silva and the main proposal is to reduce 40 percent of national greenhouse gas emissions up to 2020, based mainly on the reduction of deforestation.

"Brazil has the obligation to propose a global goal. One must make the first move to break developed countries' stillness," Tasso Azevedo told the Sustainable Amazon Forum held in Belem in northern Brazil.

According to Azevedo, without an overall limit it is not possible to calculate emissions and set compensatory mechanisms such as Reducing Emissions from Deforestation and Degradation (REDD), and the risk is that developed countries buy credits for reductions from other nations and keep on emitting greenhouse gases with no restrictions.

"We cannot repeat with REDD the same mistake made with CDM (Clean Development Mechanism), which is bankrupt in terms of reducing emissions," he said.