With air pollution causing more than one million deaths in 2015 and reducing the lifespan of citizens in northern China by three years, clean energy has become a top priority for China’s leaders. China tops the world in wind and solar power installations and the government plans to invest more than $360 billion through 2020 on renewable energy. But the green energy transition needs more than renewable power generation: Long-distance electricity transmission could play a key role in cleaning up China’s brown skies. Our recent study estimated that transmitting a hybrid of renewable and coal power through 12 new high-voltage transmission lines could prevent 16,000 deaths from air pollution exposure, and avoid 340 million tons of CO₂ emissions in China.

A threat looms on the sun-splashed horizon of the Republic of the Marshall Islands. The specter of climate change wraps its fingers around the islands, raising sea levels, salinizing soils, and sapping freshwater resources. These changes will make it even harder to sustain crops, which could push the population to even greater reliance on  processed foods, which has already spurred a diabetes epidemic on the islands. The major role played by the United States in the history of the Marshalls, where nuclear bombs were famously tested during the Cold War, may continue, as the impacts of another existential threat—climate change—continue to increase.

While attention in the United States is focused on the disasters in Puerto Rico and the Caribbean, a crisis across the Atlantic is rapidly becoming one of the worst humanitarian disasters since World War II. In the Lake Chad basin of West Africa, about 17 million people are affected by the emergency, struggling with food insecurity, widespread violence, involuntary displacement, and the consequences of environmental degradation. An estimated 800,000 children suffer from acute malnutrition; and although international donors pledged $672 million in February, the famine and humanitarian misery continues unabated. Suicide bombings and attacks by Boko Haram, which have killed at least 381 civilians since April 2017, have forced many people to leave their homes and farmers to leave their lands, interrupting livelihoods and reducing food supplies.

In 2011, a group of Hong Kong water activists and researchers traveled the length of the Dongjiang (East) River, which stretches from northeast Guangdong Province into Hong Kong’s New Territories, to investigate the challenges facing the watershed. The Dongjiang basin, which provides nearly 80 percent of Hong Kong’s water supply, has suffered water shortages due to the region’s increasing urbanization and industrialization. They found unchecked wastewater discharges—from agriculture, poultry farms, chemical plants, tanneries, and even an open-air quartz quarry—were dangerously degrading  water quality.

Girls and women bear the brunt of climate change impacts. Natural disasters kill more women than men: an estimated 90 percent of those killed in some weather-related disasters were female. The effects of climate change on natural resources can also further exacerbate existing gender inequalities.  Girls may be kept out of school to fetch water, as droughts drive them to walk farther and farther to find it. Seeking to stretch scarce household resources, families may marry off their daughters before the legal age and they may become more vulnerable to human trafficking after natural disasters.

The future of global security will depend in large part on the fate of today’s 1.2 billion young people. Do youth between the ages of 15 and 24—a critical phase of life—possess  the necessary social, physical, intellectual, and financial building blocks to underpin productive, healthy adulthoods? Or do they lack this solid base, putting them at risk of personal and social instability?

Following a series of recent devastating extreme weather events – mudslides in Sierra Leone, flooding in south Asia, and severe storms hitting the Philippines and the Gulf of Mexico, many have called attention to the role of climate change in these disasters. The string of Atlantic hurricanes that has devastated the Caribbean has prompted fresh calls to make nations and communities more resilient to the effects of climate change, and especially to address “loss and damage” in island nations.

Every day, millions of people flip switches to turn on the lights or warm up the house, while millions of others light candles or wood-fired stoves. While most people know that the source of the energy we use varies according to where we live, many don’t realize that energy decisions are not gender neutral. Every country’s policy decisions about energy production and use have significant implications for women’s empowerment and the level of equality (or inequality) between women and men.