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 developing 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 nation developed on coal, and countries in the developing world are following suit because coal is cheap, local and easy to use. Affordable coal electricity is helping lift their people 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 millions of off-grid citizens and villages, building their own solar power system may be the fastest way to get electricity. Dr. Scott Tinker visits a houseboat family in Vietnam, a Maasai family in Kenya, the Arhuaco tribe in remote Colombia, solar nonprofits and innovative start-ups to learn what it takes to plan, fund and build solar far off the beaten path.

Dr. Scott Tinker and a team of volunteers return to the jungles of Colombia with an international solar nonprofit, to build a solar microgrid - as utilities, NGOs and local 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.

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 developing 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.