A South Korean man takes a photo of his baby during a picnic in Seoul, in 2009. After years of promoting family planning, South Korea is seeing unprecedented numbers of women staying single into their 30s — up from a handful a generation ago to 40 percent.
Jung Yeon-Je/AFP/Getty Images
The world's population has just hit 7 billion people and continues to grow. Population experts are concerned about the rise in consumption that will accompany the increase in people. One California home builder, ZETA Communities, designs and builds small, highly energy-efficient homes.
Indian schoolchildren write English alphabets on slates at a primary school outside Hyderabad in June. India is on track to overtake China as the most populous nation in just 16 years.
Noah Seelam/AFP/Getty Images