Core Viewpoint - Brazil's National Oil Company (Petrobras) has received approval for oil and gas exploration in the Amazon River mouth after a five-year environmental assessment, which could significantly increase the country's oil reserves and create numerous jobs [2]. Group 1: Exploration Approval - Petrobras announced on October 20 that the Brazilian Institute of Environment and Renewable Natural Resources has approved its oil and gas exploration activities in the equatorial edge of the Amazon River mouth basin [2]. - The drilling platform is on standby in the area and will commence exploration immediately upon receiving environmental permits to gather geological information and assess the potential for commercially viable oil and gas resources [2]. Group 2: Resource Potential - According to Itaú Bank, the Amazon basin may contain 5.7 billion barrels of oil, which could increase Brazil's oil reserves by 34% [2]. - The National Confederation of Industry estimates that the exploration work could create approximately 495,000 jobs and contribute 175 billion Brazilian Reais to GDP [2]. Group 3: Investment and Feasibility - Analysts believe that the scale of investment required for the exploration is substantial, and the commercial viability remains to be validated, indicating that it may not necessarily yield corresponding returns [2].