Electricity

Millions of Americans have been sweltering through heat waves in recent weeks, and U.S. forecasters warn of a hot summer ahead. Globally, 2023 saw the warmest June on record, according to the European Union’s climate change service. That heat continued into July, with some of the hottest global daily temperatures on satellite record, and possibly the hottest. For people who struggle to afford air conditioning, the rising need for cooling is a growing crisis. An alarming number of Americans risk losing access to utility services because they can’t pay their bills. Energy utility providers shut off electricity to at least 3 million customers in 2022 who had missed a bill payment. Over 30% of these disconnections happened in the three summer months, during a year that was the fifth hottest on record. In some cases, the loss of service lasted for just a few hours. But in others, people went without electricity for days or weeks while scrambling to find enough money...

More than 3.6 million electric cars are driving around the U.S., but if you live in an apartment, finding an available charger isn’t always easy. Grocery stores and shopping centers might have a few, but charging takes time and the spaces may be taken or inconvenient. Several states and cities, aiming to expand EV use, are now trying to lift that barrier to ownership with “right to charge” laws. Illinois’ governor signed the latest right-to-charge law in June 2023, requiring that all parking spots at new homes and multiunit dwellings be wired so they’re ready for EV chargers to be installed. Colorado, Florida, New York and other states have passed similar laws in recent years. But having wiring in place for charging is only the first step to expanding EV use. Apartment building managers, condo associations and residents are now trying to figure out how to make charging efficient, affordable and available to everyone who needs it when they need it....

The U.S. government is planning to crack down on power plants’ greenhouse gas emissions, and, as a result, a lot of money is about to pour into technology that can capture carbon dioxide from smokestacks and lock it away. That raises an important question: Once carbon dioxide is captured and stored, how do we ensure it stays put? Power plants that burn fossil fuels, such as coal and natural gas, release a lot of carbon dioxide. As that CO₂ accumulates in the atmosphere, it traps heat near the Earth’s surface, driving global warming. But if CO₂ emissions can be captured instead and locked away for thousands of years, existing fossil fuel power plants could meet the proposed new federal standards and reduce their impact on climate change. We work on carbon capture and storage technologies and policies as a scientist and an engineer. One of us, Klaus Lackner, proposed a tenet more than two decades ago that is echoed in the proposed standards: For all car...

Coca-Cola is one of the world’s most widely recognized brands. Its global reach, spanning more than 200 countries, was the theme of a 2020 commercial that showed families drinking Coke with their meals in cities from Orlando, Florida, to Shanghai, London, Mexico City and Mumbai, India. Operating on that scale creates a big carbon footprint. The company uses over 200,000 vehicles to distribute its products every day and runs hundreds of bottling plants and syrup factories across the globe. But Coke’s single largest contribution to climate change comes from its refrigeration equipment. Running refrigerators uses a lot of electricity, and some coolants in these systems are greenhouse gases that trap heat in the atmosphere. Almost two-thirds of the climate impact of refrigeration comes from electricity consumption, and refrigerants account for the rest. As of 2020, refrigeration produced nearly 8% of global greenhouse gas emissions....

Hydrogen, or H₂, is getting a lot of attention lately as governments in the U.S., Canada and Europe push to cut their greenhouse gas emissions. But what exactly is H₂, and is it really a clean power source? I specialize in researching and developing H₂ production techniques. Here are some key facts about this versatile chemical that could play a much larger role in our lives in the future. So, what is hydrogen? Hydrogen is the most abundant element in the universe, but because it’s so reactive, it isn’t found on its own in nature. Instead, it is typically bound to other atoms and molecules in water, natural gas, coal and even biological matter like plants and human bodies. Hydrogen can be isolated, however. And on its own, the H₂ molecule packs a heavy punch as a highly effective energy carrier. It is already used in industry to manufacture ammonia, methanol and steel and in refining crude oil. As a fuel, it can store energy and reduce emi...