With the demand for electric batteries sky-high, mining companies are moving to the salt flats of the Andes, where over half of the world's known lithium reserves are stored.
Mexico is rushing to complete a new train line around the Yucatan Peninsula that will link tourist resorts with cities and famous Maya sites. But large areas of tropical forest have been cut down, and activists say a unique network of sinkholes called cenotes are also at risk.
The US is reassessing its security clearances after 21-year-old Jack Teixeira allegedly leaked dozens of secret government documents on a Discord server.