It's hard to find a spare tire in Cuba these days, or a cup of yogurt.
Air conditioners are shut off in the dead heat. Factories close at peak hours, and workers go without their government-subsidized lunches. The communist government imposed conservation measures even as it continues to get free oil for services from Venezuela, fueling rumors that Cuba is selling President Hugo Chavez's crude on the side to raise cash. President Raul Castro scolded Cubans in a national address Sunday to work harder because they have no one to blame but themselves.