Grid-forming inverters don’t sound exotic, and indeed they’re not. But these prosaic chunks of equipment are key to connecting wind and solar farms with existing power grids in ways that keep the grids stable, especially as renewable energy produces more and more of our electricity.
I learned this and a whole lot more about the infrastructure needed to make electricity-delivery systems climate friendly by reading contributing correspondent Alexandra Witze’s article “An electrical grid update.” It’s part of our ongoing “The Climate Fix” series investigating how people around the world are devising climate change solutions. Other recent coverage has included the most effective strategies to reduce carbon emissions (SN: 1/28/23, p. 22) and efforts by Kenya and other East African countries to make use of their abundant geothermal resources (SN: 7/1/23, p. 22).
Finding ways to get renewable energy safely into the grid isn’t the only upgrade needed. Agriculture also generates a lot of greenhouse gases. Consider cows. They produce a significant percentage of the world’s methane emissions, and animal scientists are experimenting with curbing the ruminants’ contributions. That includes adding red algae to the animal’s food. The algae disrupt gut microbes’ ability to produce methane, making cow burps less of a climate threat. But concerns that toxic by-products from the algae might get into milk and beef have led some scientists to switch tactics — instead adding red algae to cow poop, earth and climate writer Carolyn Gramling reports. There, the algae reduce methane emissions from decomposing manure. It’s not enough to solve the cow-methane problem, but it’s a start.
The article on upgrading electrical grids led me to ruminate on the dominance of alternating current, or AC, in electrical systems. It wasn’t always a sure thing. Thomas Edison flipped the switch on the world’s first central power plant in New York City in 1882,…
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