Marcos Rupérez Cerqueda is a Spanish industrial engineer with a master’s degree in hydrogen from Aalborg University. He spent years working on green hydrogen projects before questioning their promise, and now works on rural technology development in the Spanish Pyrenees. He hosts the Spanish-language podcast Café y Puro. His book, Inner Degrowth: From Energy Collapse to Existential Void (foreword by Antonio Turiel), is available in paperback, hardcover and Kindle.
'SELECT SQL_CALC_FOUND_ROWS wp_posts.ID
FROM wp_posts INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id )
WHERE 1=1 AND (
wp_posts.ID NOT IN (
SELECT object_id
FROM wp_term_relationships
WHERE term_taxonomy_id IN (47485,47486)
)
) AND (
(
( wp_postmeta.meta_key = \'the_author\' AND wp_postmeta.meta_value = \'4035929\' )
OR
( wp_postmeta.meta_key = \'secondary_author\' AND wp_postmeta.meta_value LIKE \'{1d9264815df1467260949565c2f34defd3e00f7fbadbc4b49cd73676ab026116}\\"4035929\\"{1d9264815df1467260949565c2f34defd3e00f7fbadbc4b49cd73676ab026116}\' )
)
) AND wp_posts.post_type = \'post\' AND ((wp_posts.post_status = \'publish\'))
GROUP BY wp_posts.ID
ORDER BY wp_posts.post_date DESC
LIMIT 0, 6'
‘Inner Degrowth’: An engineer on why the energy crisis and our inner emptiness are the same problem
Marcos Rupérez Cerqueda spent years as an engineer on green hydrogen projects in Spain, installing electrolysers and fuel cells, before the numbers made him stop believing in a technical fix. In this Q&A, he discusses this journey and his new book.
October 8, 2026
