Alistair Walsh

Image: Lewis Sanders

Alistair Walsh

Skip next section Featured stories by Alistair Walsh

Featured stories by Alistair Walsh

Loggers work loading timber logs, surrounded by piles of felled trees

Loggers work loading timber logs, surrounded by piles of felled trees

Earth has already exceeded 2024 annual ecological limits

To continue living the way we do, humanity would need the resources of more than 1 1/2 planets.

Waterfall at tropical Rainforest of Ranomafana National Parks in Madagascar

Waterfall at tropical Rainforest of Ranomafana National Parks in Madagascar

Dramatic forest loss due to farming, climate change: report

Every day the planet loses more and more trees to deforestation. But why are forests so important for us anyway?

Smoke rises from a city in the early morning

Smoke rises from a city in the early morning

What is the Anthropocene?

Many scientists say profound human-driven change to our planet has ushered a new geological epoch. Others are less sure.

Skip next section Stories by Alistair Walsh

Stories by Alistair Walsh

Two people paddle through floodwaters in a canoe

Two people paddle through floodwaters in a canoe

Is climate change behind all extreme weather events?

Is climate change behind all extreme weather events?

From extreme heat to cyclones and flooding, what is causing extreme weather across the world?

An ice stupa in the village of Gya

An ice stupa in the village of Gya

Can artificial glaciers help with water shortages?

Can artificial glaciers help with water shortages?

As rising temperatures cause glaciers around the world to recede, some countries have started making their own.

A young woman carries a water jug on her back through a dry landscape

A young woman carries a water jug on her back through a dry landscape

How sustainable farming could help Ethiopian farmers

How sustainable farming could help Ethiopian farmers

Drought, planetary heating, war: The reasons for Ethiopia's food crisis are complex. Can smart farming techniques help?

Wildebeest crossing a river

Wildebeest crossing a river

What are migratory species and why are they threatened?

What are migratory species and why are they threatened?

Why do animals migrate and how can we protect them?

A man on a horse, the sky is darkened by smoke from wildfires and firemen stand in the background

A man on a horse, the sky is darkened by smoke from wildfires and firemen stand in the background

Did humanity just break the Paris climate agreement?

Did humanity just break the Paris climate agreement?

For a whole year, the planet exceeded 1.5 degrees Celsius warming limit. Are we on the path to "climate chaos?"

A close up of a red and blue dart poison frog

A close up of a red and blue dart poison frog

Brazil proposes global forest fund at Dubai climate talks

Brazil proposes global forest fund at Dubai climate talks

People in scores of rainforest nations could be paid to preserve forest areas under Brazil's new concept.

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