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Explained

The iron ocean

Through dust, not rust, the metal plays a complex, controversial role in Earth’s climate

How much meat can we eat — sustainably?

Scientists find that a small amount of animal products could have a place in our diets without wreaking environmental havoc. But it’s far less than what we consume today, and only if farmed in just the right way.

Rethinking cities in the face of extreme heat

VIDEO: Cities have recently experienced extreme heat waves, causing preventable illness and death. How can we protect people from dangerous heat while also reducing carbon emissions?

The obscure calculation transforming climate policy

After long debate, economists and philosophers are reaching consensus on how to value future generations

Beyond COP27: Who will pay for climate solutions?

VIDEO: Economic issues were front and center at the most recent global climate summit. Join Tobias Adrian of the International Monetary Fund and Shuang Liu of the World Resources Institute to take stock of the investments needed to prevent future climate disasters.

Why solar geoengineering should be part of the climate crisis solution

The controversial technology of reflecting sunlight away from the planet could help blunt the worst impacts of climate change

Unpersuasive: Why arguing about climate change often doesn’t work

COMIC: In the US, where political parties have increasingly staked claims on one side of the issue or the other, beliefs may be more about belonging than facts

Marine wildlife is starting to suffocate

Global warming and agricultural runoff have driven the loss of oxygen in oceans around the world, with looming ecological consequences.

Rethinking insurance for floods, wildfires and other catastrophes

The industry is in crisis just when disaster coverage is most needed

How to handle climate anxiety

Worry over the planet’s future is taking a toll on emotional well-being, researchers say. Here’s how to cope so we don’t lose hope for our planet and for ourselves.

Insuring our uncertain future

VIDEO: Is the disaster insurance industry hurtling toward a climate crisis? Learn how we can shore up programs that buffer the financial devastation that follows floods, fires and hurricanes — and help individuals and communities strengthen their climate resilience.

The history of climate change offers clues to Earth’s future

PODCAST: Digging — quite literally — into our planet’s past to study its paleoclimate has shed light on bygone ice ages and hints at trouble ahead for our now-warming world (Season 2/Episode 4)

As the Arctic warms, beavers move in

Scientists are just beginning to study the impacts of beaver dams on the tundra

How green are biofuels? Scientists are at loggerheads

Replacing gasoline with ethanol has changed landscapes across the globe as grasslands and forests give way to cornfields. Researchers are deeply divided over what this means for the planet. Here’s the science behind the conflict.

Lyme and other tick-borne diseases are on the rise. But why?

The complex interplay of ticks, their habitats and hosts — along with changes in land use and climate — may be enabling the spread of the pathogens they carry

Effects of a fence

A satellite image reveals how humans and their herds are changing the Arctic from the ground up

Edith’s checkerspot butterfly: Checkered past, uncertain future

How do animal populations respond to climate change? After studying the same butterfly and its habitats for decades, two biologists explain that it’s complicated — but endlessly intriguing.

A lifetime of climate change

Researcher Arun Agrawal has lived three decades on either side of a watershed: the United Nations Framework Convention on Climate Change, signed 30 years ago this June. His 60 years are a window into how far we have come, and how far there is to go.

Quest to secure the world’s vanishing ice

Glaciologists dream of a cold-storage vault in Antarctica to preserve key samples of the paleoclimate

The tricky task of tallying carbon

To slow or stop global warming, the world agrees it must cut carbon dioxide emissions. But monitoring each nation’s output of greenhouse gases is not always straightforward.

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