This year’s World Water Day is taking on a broader theme than years past: sustainable development. The theme makes sense as two major international processes – the drafting of the Sustainable Development Goals to replace the Millennium Development Goals, and the most anticipated UN Climate Summit in years – are taking place in 2015. Decisions made over the next nine months will play a huge role in relationships between nations and global development priorities going forward.

India is one of the most water-challenged countries in the world, from its deepest aquifers to its largest rivers. Groundwater levels are falling as farmers, new urban residents, and industries drain wells and aquifers. What water is available is often severely polluted, and the future may only be worse, with the national supply predicted to fall 50 percent below demand by 2030.

From the mountains and foothills of the Himalayas to the Terai plains, climate change is rapidly changing life in Nepal. Many communities however, are not strangers to environmental stress; for decades, rapid population growth alongside agriculture and fuelwood collection have degraded land and diminished forests. [Video Below]

BANGWEULU WETLANDS, Zambia – Out here on the endless swamps, a harsh truth has been passed down from generation to generation: There is no fear but the fear of hunger.

How to stop climate change while expanding energy production is one of the biggest challenges in global development. Doing so requires all kinds of improvements in efficiency – from reducing the amount of electricity lost in transmission to better motors and lightbulbs. But, as demonstrated by recent efforts in the Pentagon, changes to how people work may be the lowest hanging fruit.

“We don’t know the reason for the death of fish in downstream villages,” Hamberton Nongtdu, a mine owner from the northeastern Indian state of Meghalaya, told me.