Poverty, women's rights, climate change - indeed, many of the world's most pressing challenges - can be explained by answering one simple question: Can you turn your lights on in the morning?
2022 • 6.6 ★
1999 • 8.0 ★
2010 • 8.2 ★
1950 • 7.6 ★
2006 • 5.2 ★
