Rush for lithium, cobalt and nickel is ravaging livelihoods, water and health of world’s most vulnerable, UN study says

Critical minerals such as lithium, cobalt and nickel are becoming the “oil of the 21st century” as the scramble for precious metals deepens poverty and creates public health crises in some of the world’s most vulnerable communities, a report by the UN’s water thinktank has found.

The investigation by the United Nations University Institute for Water, Environment and Health (UNU-INWEH) concluded that the growing demand for lithium, cobalt and nickel used in batteries and microchips is draining water supplies, eroding agriculture and exposing communities to toxic heavy metals.

An ambitious ‘refaunation’ project is bringing the much-loved birds and other lost species back to the city’s national park

Images of the iconic blue-and-yellow macaw can be spotted all over Rio de Janeiro. Yet the real thing has been seen so rarely in the Brazilian city that some wondered if it ever really existed there at all.

The French explorer Jean de Léry first described an abundance of the giant, colourful parrots around Indigenous tribes in the 16th century, and the Austrian naturalist Johann Natterer sighted the Ara ararauna in the city in 1818.

Low-cost tech and joined-up funding have reduced illegal logging, mining and poaching in the Darién Gap – it’s a success story that could stop deforestation worldwide

There are no roads through the Darién Gap. This vast impenetrable forest spans the width of the land bridge between South and Central America, but there is almost no way through it: hundreds have lost their lives trying to cross it on foot.

Its size and hostility have shielded it from development for millennia, protecting hundreds of species – from harpy eagles and giant anteaters to jaguars and red-crested tamarins – in one of the most biodiverse places on Earth. But it has also made it incredibly difficult to protect. Looking after 575,000 hectares (1,420,856 acres) of beach, mangrove and rainforest with just 20 rangers often felt impossible, says Segundo Sugasti, the director of Darién national park. Like tropical forests all over the world, it has been steadily shrinking, with at least 15% lost to logging, mining and cattle ranching in two decades.