CHENNAI, India – T. Rajan tried all manner of entrepreneurial enterprises. He sold scrap paper and cardboard to recyclers. He built a street corner chai and cigarette cart, and repaired truck and bus tires. He started an office cleaning service for high-tech companies in the growing IT sector south of the city center. None of these delivered the financial returns and workday flexibility of selling clear, sky blue, 20-liter water “cans” in Chennai’s immense bottled water industry.

Before the 2015 floods that drowned Chennai, Pradeep John spent several years posting thorough and dutifully accurate updates and alerts on Twitter and Facebook as the Tamil Nadu Weatherman. An amateur meteorologist who developed considerable expertise in weather data and satellite imagery, John’s online followers relied on his crisp forecasts and advice.

VILAMBUR, India – The mammoth coal-fired Cheyyur electrical station was first imagined by bankers at India’s Power Finance Corporation and senior engineers across town at the Central Electric Authority. That was in 2005, when the country was rich in fossil fuel resources and desperate for electric power. Though India mined more coal than almost any other country, endemic blackouts and brownouts enfeebled its economic prospects.

Water security remains an ambiguous concept with an uncharted path to achievement. Water is an essential resource to our survival and livelihoods, yet most countries lack a clear strategy for how to protect and manage it. With increasing rates and sources of consumption, a growing population, and shifting frequency and intensity of rates of precipitation, continued inaction will have serious impacts on our national security, economy, and environment.

True to essentialist stereotypes, Latin America’s indigenous peoples are the best stewards of the region’s rainforests. But the source of their enthusiasm for environmental protection is more complex than mere ascriptive traits or whether they speak native languages. What’s more, in a development that should be worrying to environmentalists, exposure to the negative effects of extractive industries appears to have a degrading effect on that enthusiasm.

The waters of Lake Chad sustain 70 million people in four countries. Beginning in the 1970s, the 25,000-square-kilometer lake began shrinking due to excessive drawdown for agriculture and mining. Now only 10 percent remains. The dwindling water supply devastated food production and fostered massive economic and political tensions. Many experts credit the worsening conditions for contributing to the rise of Boko Haram, an extremist group that has killed 20,000 people and forced 2.3 million more to flee.

Known as the “vitamins of industry,” rare earths refer to a cluster of minerals widely used in green technologies such as wind turbines, rechargeable batteries, and electric vehicles. Rare earth elements embedded in these products keep them light, efficient, and affordable. They’re essential to the decarbonization of the global economy envisioned in the Paris Climate Agreement, agreed to by 192 countries in 2015. And we may soon face a significant shortage, due in no small part to changes in China.