New Delhi, April 9 -- Mexican President Claudia Sheinbaum on Wednesday announced plans to tap into unconventional natural gas deposits in an effort to lower her country's reliance on foreign energy at a time when the Iran war is disrupting global energy markets.

But Sheinbaum - a scientist and climate expert - notably avoided the term hydraulic fracturing or "fracking," a drilling method used to extract oil and natural gas from deep underground bedrock using a highly pressurized liquid. Instead, she framed the initiative as a quest for "sustainable" extraction, emphasizing that environmental impacts would be minimized to the greatest extent possible.

The technical feasibility of "sustainable fracking" is a subject of significant debate ...