Looking at growth rates among developing Asian economies over the last 20 years, the report extrapolated that at such rates, by 2030 developing Asian countries will comprise about 43% of worldwide consumption. These are typically urban lifestyles, fortified by a high rate of rural-urban migration. The growing concentration in cities demands many things, including more transportation, more convenient foods (processed and packaged) and more energy. Relocating to urban areas for employment also means that some people maintain two houses - one which is the family house in the village and a second, usually a rented apartment in the city, for work - which is materially more demanding. In emerging economies, economic growth is lifting many people out of poverty, however a large number of people remain under the minimum sustenance line, and keep slipping behind.