PARIS--France and Brazil adopted a common policy Saturday ahead of key UN global warming talks and vowed to launch a worldwide push to convince other powers to back their "climate bible".

A joint text was unveiled after talks between French President Nicolas Sarkozy and his Brazilian counterpart Luiz Inacio Lula da Silva, which gave an outline of an agreement they want at the December 7-18 Copenhagen summit.

"We are making public... a French-Brazilian text because Brazil and France, we want Copenhagen to be a success, not a cut-price agreement," Sarkozy said.

Lula hailed it as a "climate bible" and a "historic document".

"I hope that it will be a paradigm to frame the talks," he added.

The document does not go into great detail, notably on figures, which have been a sticking point for the United States and China.

It recalls only that the final objective is a "global reduction of at least 50 percent by 2050 compared with 1990" of damaging greenhouse gases worldwide.

For developed countries, there must also be "ambitious objectives for reduction in the medium term," the text said.

Developing countries must "actively contribute to the global effort" to cut their harmful emissions, but in a "fair, global and robust framework" which should include "new and substantial financial support" for the poorest.

Paris and Brasilia also agreed on the creation of a global environmental organization, which could be set up in 2012.

The announcement came after Brazil on Friday said it would offer a "voluntary" cut of between 36 and 39 percent in greenhouse gas emissions at the Copenhagen summit.

Brazil is the fourth-biggest emitter of greenhouse gases in the world, largely because of carbon released through deforestation of its vast Amazon forest by ranchers and farmers.

The heads of state said they would launch an international drive to get other countries to back their text.