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Vials of donor sperm frozen by liquid nitrogen

Health

Sperm quality has been declining for 16 years among men in the US

Data from 170,000 semen analyses performed in the US between 2005 and 2021 reveals a worrying decline in sperm quality

News

WMXRC9 An Ultra low emission zone (ULEZ) boundary sign at the Marble Arch end of Oxford Street, London.

Environment

Will London's expanded Ultra Low Emission Zone cut air pollution?

Insight

camcopter-S-100

Environment

Drones are 'sniffing' ship exhaust for illegal fuel in European waters

News

A third of the world's food goes to waste – here's how to stop the rot

Humans

A third of the world's food goes to waste – here's how to stop the rot

Features

Blurred silhouettes of cars surrounded by steam from the exhaust pipes

Environment

WHO calls for lower limits on air pollution to save millions of lives

News

The toxic error at the heart of efforts to curb heavy metal pollution

Environment

The toxic error at the heart of efforts to curb heavy metal pollution

Comment

Fireman in forest fire

Health

Wildfire pollution linked to at least 33,000 deaths worldwide

News

ZAOZHUANG, CHINA - MARCH 23, 2020 - Ten thousand mu peach blossom in full bloom, Zaozhuang City, Shandong Province, China, March 23, 2020.- PHOTOGRAPH BY Costfoto / Barcroft Studios / Future Publishing (Photo credit should read Costfoto/Barcroft Media via Getty Images)

Environment

China's covid-19 lockdowns brought forward spring bloom by eight days

News

Why it is so important to protect access to the dark night sky

Space

Why it is so important to protect access to the dark night sky

Comment

Wildfire

Health

US wildfire pollution linked to more covid-19 cases and deaths

Polluted air caused by smoke released from record-breaking wildfires in the US last year has been linked to a strong increase in covid-19 cases and deaths

News

Environment

Why chemical pollution is turning into a third great planetary crisis

Features

Life

Seagull eggs in the UK have been contaminated with plastic additives

News

Health

Campaigners troubled by WHO delay of tougher air pollution guidelines

News

Environment

Can the UK recycle plastic without dumping it on other countries?

Insight