The document summarizes Brazil's energy crisis in 2001-2002 and the government's response. Key points: - Brazil experienced its most serious energy crisis in decades due to low hydroelectric reservoir levels. Rationing was needed to conserve 20-25% of typical energy consumption for 8 months. - The government implemented a quota system rather than rolling blackouts, assigning consumption targets to customers based on history to incentivize reductions. - The quota system was effective, achieving a 26 TWh reduction in energy use. Residential consumption habits changed permanently. The economic impact was mitigated through the rationing scheme.