Ensuring a long-term reduction by changing the economic development model of the Amazon required foreign help, Silva said in an interview at her office in Brasilia.

"We don't want charity, it's a question of ethics of solidarity," said Silva, who defended the Amazon in the 1980s alongside legendary conservationist Chico Mendes.

"We need additional help. In the same way that it's difficult for rich nations to change their energy matrix from fossil to renewable (fuels), it's difficult for developing nations to change their (economic) models," said Silva, who wore a necklace made of tree seeds from the Amazon.

In addition to voluntary donations, foreigners needed to help create alternative economic activity in tropical forests by rejecting eco-unfriendly products, transferring technology, and remunerating genetic research and natives' knowledge.

Despite pledges to the contrary, several western countries were opposing a proposal co-authored by Brazil within the international Convention on Biodiversity that would force pharmaceutical companies to pay for drugs derived from Amazon medicinal plants.

"Rich countries need to pay for the use of our biodiversity," said Silva, who became literate at age 16 and worked as a maid before going on to study history.

She said such aid should be "an additional effort," and not involve carbon credits or other benefits for rich countries.

The United States has not ratified the convention, Australia opposed the new rules and Germany and Switzerland were cautiously monitoring talks, said Braulio Dias, a Silva adviser.

Silva cited Chinese cooperation with Brazilian satellites to help monitor the Amazon as an example of foreign aid.

The administration of President Luiz Inacio Lula da Silva busted 1,500 companies, confiscated 1 million cubic meters of wood and 66,000 properties and would reduce deforestation by nearly 75 percent between 2005 and the end of 2007, Silva said.

"We are assuming our responsibility. Brazil had a target of zero illegal deforestation," Silva said without giving a deadline.

An aide said the dynamics in the Amazon were to complex to allow for deforestation targets.

An estimated 9,600 square km (3,707 sq miles) of the world's largest rain forest were cleared in the year ended July 31, compared to a revised 14,039 sq km (5,417 sq miles) the previous year, the government said in August.