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Just generating heat is not enough. We must also capture, store, and utilize waste heat year-round and especially in the winter months. (AP Photo/David J. Phillip)

Why we need to reuse waste energy to achieve net-zero heating systems

As the drive towards electrification advances, one fact seems clear: it is far easier to reuse waste heat for our homes and businesses than it is to generate it anew.
Men transporting a large bag in the Muvumba river valley in Kigali. A massive Rwandan electrification programme sets out to benefit rural communities. Shutterstock

How electricity changes lives: a Rwandan case study

A massive rural on-grid electrification programme in Rwanda has delivered considerable benefits. But is it the most sensible way to deliver power to remote areas?
Solar home designed by University of Maryland students for the Department of Energy’s 2017 Solar Decathlon. DOE Solar Decathlon

Subsidizing coal and nuclear power could drive customers off the grid

Energy Secretary Rick Perry says the US needs to subsidize nuclear and coal power plants to keep the grid stable. But this policy would raise energy costs and could drive consumers off-grid instead.
A solar water heating unit on the roof of a home in Kuyasa outside Cape Town. South Africa has a long way to go to get people off the grid and onto solar heating. Epa/Nic Bothma

Advances in getting solar onto the grid, and into the home

Africa is blessed with an abundance of sunshine.Given the heavy demand for energy, alternatives, such as solar, could provide solutions and help stimulate economic growth.

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