Pollution

23 articles with this tag

What Is NDMA—the Carcinogen in Water and Drugs Health

What Is NDMA—the Carcinogen in Water and Drugs

NDMA is a probable human carcinogen found in drinking water, processed foods, and recalled medications like Zantac. Here is how it forms, why it is da...

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How Hydrogen Sulfide Kills—and Why You Can't Smell It Science

How Hydrogen Sulfide Kills—and Why You Can't Smell It

Hydrogen sulfide is one of the deadliest gases in industrial workplaces. It smells like rotten eggs at low levels but destroys your sense of smell at...

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How Microplastics Enter Your Body—and What They Do Science

How Microplastics Enter Your Body—and What They Do

Microplastics reach the human body through food, water, and air, accumulating in organs from the lungs to the brain. Here's what science knows about h...

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How the Montreal Protocol Works—and Why It Saved the Ozone Science

How the Montreal Protocol Works—and Why It Saved the Ozone

The Montreal Protocol, signed in 1987 and ratified by every UN member, phased out over 98 percent of ozone-depleting chemicals. Here is how the treaty...

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How PM2.5 Harms Your Body—From Lungs to Brain Health

How PM2.5 Harms Your Body—From Lungs to Brain

Fine particulate matter smaller than 2.5 micrometers penetrates deep into lungs, enters the bloodstream, and reaches the brain, contributing to nearly...

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How Lead Poisoning Works—and Why No Level Is Safe Health

How Lead Poisoning Works—and Why No Level Is Safe

Lead tricks the body by mimicking calcium, slipping past the blood-brain barrier and disrupting neuron signaling. Here's how this ancient metal still...

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How Light Pollution Works—and Why It's Erasing Stars Science

How Light Pollution Works—and Why It's Erasing Stars

Artificial light at night creates skyglow, disrupts wildlife, suppresses melatonin, and has brightened Earth's nights by 16% since 2014. Here's how it...

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What Are PFAS and Why Are They Called Forever Chemicals? Science

What Are PFAS and Why Are They Called Forever Chemicals?

PFAS are a vast family of synthetic chemicals found in everything from cookware to drinking water. Their near-indestructible carbon-fluorine bonds let...

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What Are Nanoplastics and Why Are They Everywhere? Science

What Are Nanoplastics and Why Are They Everywhere?

Nanoplastics—plastic fragments smaller than a bacterium—have been found in oceans, blood, and even human brains. Here is how they form, where they end...

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How Clean Air Zones Work—and Why Cities Adopt Them Science

How Clean Air Zones Work—and Why Cities Adopt Them

Clean air zones restrict or charge polluting vehicles in city centers. With over 320 active across Europe alone, these zones measurably cut nitrogen d...

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How Water-in-Diesel Emulsion Works—and Why It Matters Science

How Water-in-Diesel Emulsion Works—and Why It Matters

Adding tiny water droplets to diesel fuel triggers micro-explosions that slash nitrogen oxide and soot emissions by up to 60–67%, all without redesign...

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How Harmful Algal Blooms Work—and Why They Spread Science

How Harmful Algal Blooms Work—and Why They Spread

Harmful algal blooms poison water, kill marine life, and cost economies billions. Here is how they form, what makes them toxic, and why they are growi...

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