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Environmental Science

Nitrogen symbol from periodic table

Understanding the Nitrogen Cycle

STEM Explained

What is the nitrogen cycle? How do human activities such as using fertilizer affect the nitrogen cycle? How can this cause greenhouse gases?

Plastic drinking straws

We Use a Lot of Plastic

STEM Explained

What are microplastics? How are plastics polluting aquatic ecosystems?

DNA barcoding used to test food

The Classification of Life: From Linnaeus to DNA Barcoding

Backgrounders

Learn about two taxonomy systems that scientists use to classify the life around us.

Wasted food on the ground

The Environmental Impact of Wasted Food

STEM Explained

One-third of all food produced is wasted. Learn about the environmental consequences of food waste, and what you can do about it.

Crispy fried crickets © phuketisland, iStockphoto

Should We Eat Bugs?

STEM Explained

What's tasty, abundant and high in protein and vitamins? Bugs! Bugs feed about 2 billion people each day. They also hold promise for food security and sustainability.

plastic food containers, trays and food packaging made from polystyrene

Polystyrene: The Pros, the Cons, the Chemistry

STEM Explained

Learn the organic chemistry behind this very useful plastic. Why is recycling polystyrene hard? Why does polystyrene often end up as solid waste?

Ship in Arctic waters

Reaching the Arctic

STEM Explained

How will arctic ice melt from climate change affect exploration, scientific research and geopolitics?

various marine microorganisms as they appear under a microscope

Marine Microbiology: Meet the Microbes of the Sea!

STEM Explained

The ocean is full of very small but very useful creatures called microbes. Without them, none of the sea plants or animals you’ve seen would exist!

An image showing the symbol, atomic number and relative atomic mass of sodium. Sodium’s symbol is Na, its atomic number is 11 and its relative atomic mass is approximately 22.99.  Image © istockphoto.com/3dalia

Na Na Na Na (Hey Hey Hey) Sodium!

STEM Explained

Sodium is a useful chemical element. You consume it as table salt regularly. Learn about salt mining, sodium uses, and what problems too much sodium can cause.

Students looking bored in class

Is There Too Much Carbon Dioxide in Your Classroom?

STEM Explained

Did you know that too much carbon dioxide in the classroom can affect your body, and even your grades?

orn ethanol plant next to corn field

How is Ethanol Made?

Backgrounders

Ethanol is a biofuel that can power a car. Learn about the enzymes, catalysts and processes like fermentation involved in ethanol production.

How is food packaged?

How is food packaged?

Hands-on Activities

Take a closer look at food packaging. Explore why and how food is packaged in different ways.

Train oil cars

How is oil moved from one place to another?

Backgrounders

This backgrounder explains the four main ways that oil is moved over land and water.

Carillon Hydroelectric Power Station, Saint-André-d'Argenteuil, Quebec

Generating Electricity: Hydroelectric Power

STEM Explained

Learn how moving water can be used to generate electricity. This is called hydroelectric power generation.

How much of an iceberg is on top of water?

How much of an iceberg is on top of water?

Hands-on Activities

In this hands on activity find out just how much of an iceberg is below the surface. It might surprise you!