3 billion people still use wood or biomass to cook their food and heat their homes. But these necessities come at a devastating cost: 3 million people die each year from breathing smoke. Dr. Scott Tinker visits Nepal, to see how they- like many countries- are transitioning to modern cooking fuels, and the many benefits these bring.

100 million people move to cities each year, mostly in the developing world- and they often settle in slums. How will governments and utilities battle cartels, corruption and budget shortfalls to supply electricity to these new urban citizens? Dr. Scott Tinker visits Kibera, Africa’s largest slum, to look at the challenges to urban grid expansion.

Nearly every country developed on coal, and the developing world is following suit because coal is cheap, local and easy to use. Affordable coal electricity is helping lift these countries out of poverty, but at local and global environmental costs. Dr. Scott Tinker travels to Vietnam to see the benefits and challenges of developing on coal.

Many countries in Africa, Asia and Latin America aim to build hydroelectric projects, large and small, to bring electricity to their growing cities and power their economies. Join Dr. Scott Tinker in Ethiopia, at the construction site of Africa's largest dam, to understand the key issues of building hydro here and across the developing world.

For hundreds of thousands of off-grid villages around the world, building their own solar-powered microgrid may be the fastest way to get electricity. The Arhuaco tribe in remote Colombia has asked a solar nonprofit for help. Dr. Scott Tinker joins them to learn what it takes to plan, fund and build a solar microgrid far off the beaten path.

Join Dr. Scott Tinker, Solar Electric Light Fund and a team of volunteers as they return to the jungles of Colombia to build a solar microgrid- as utilities, nonprofits and entrepreneurs are doing across the developing world. With the help of the Arhuaco villagers, for the first time ever this remote community will have the power to Switch On.

1 billion people still live without electricity, mostly in rural areas where the power grid doesn't reach. Dr. Scott Tinker goes to rural Kenya, to see how micro solar solutions- sold by local entrepreneurs, paid for with mobile phone banking- can bring light for literacy, water for farming, and cultural connection to off-grid families.