purify the air
Hannah Ritchie, Chatto & Windus (UK); MIT Press (USA, published March 3, 2026)

A few weeks prior, while dining with friends, the conversation turned to renewable energy—quite fitting as we had a climate journalist, an activist, and two civil servants at the table.

As expected, my dinner companions were well-versed in the perils of climate change and the pressing necessity to transition to cleaner energy sources. However, a question lingered: Does the UK still require gas as a backup fuel for the electricity grid? Can we rely solely on wind, solar, and batteries during those dreary winter months?

In such discussions, it’s timely that data scientist Hannah Ritchie’s new book has been released. Clearing the Air: A hopeful guide to solving climate change with 50 questions and answers serves as an excellent resource. Thanks to my well-thumbed copy, I was able to guide a friend through various storage solutions that maintain grid power when wind and sunlight are scarce, highlighting the roles of pumped storage, geothermal energy, and hydrogen.

In her previous work, it’s not the end of the world, Ritchie provided a swift education on addressing the planet’s environmental challenges. purify the air, though it maintains the same optimistic outlook, functions more as a practical guide with data-driven answers regarding the journey to achieve net-zero emissions.

Topics are categorized, covering fossil fuels and renewable energy to electric vehicles and domestic heating. Reading through, it’s evident that Ritchie aims to counter the deluge of misinformation and misleading media narratives surrounding the net-zero transition. Her work dispels myths, such as the idea that electric cars will frequently run out of power on highways, heat pumps are ineffective in colder climates, and that there isn’t enough land available for solar energy installations.

purify the air wields the power of scientific research and solid data to combat this misinformation. For instance, one of her addressed questions is whether wind farms pose a threat to birds—a commonly cited criticism from figures like US President Donald Trump. The response is yes; while wind turbines do unfortunately kill some birds, the figure is minimal compared to annual deaths caused by cats, buildings, vehicles, and pesticides.

Nevertheless, wind turbines do threaten certain species, including bats, migratory birds, and birds of prey. Ritchie emphasizes that measures can be taken to mitigate these risks, such as repositioning wind farms, utilizing black paint on turbines, and deactivating blades during low wind conditions. Such nuances are often lost in headlines or political jests, yet they are key to comprehending the advantages and drawbacks of transitioning to clean energy.

The Q&A format of the book makes it approachable, although repetition may set in if read in one sitting. purify the air proves to be a handy reference when dealing with climate-change skeptics during family gatherings.

Throughout, Ritchie’s characteristic optimism shines prominently. She clarifies that viable decarbonization options are available in nearly every facet of the net-zero transition, all without shying away from real challenges or indulging in wishful thinking. The impact is profound; readers will depart informed, hopeful, and reassured that humanity can prevail in the face of the climate crisis. In a landscape rife with fake news and political deception, this book truly brings a breath of fresh air.