![Hamilton, Ontario industrial area with Toronto skyline in the background](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/the-hamilton-industrial-area-with-toronto-skyline.jpg?itok=shKtb5Tb)
What are Greenhouse Gases?
Backgrounders
This backgrounder explains what greenhouse gases are and how they contribute to climate change.
![What are the effects of acid rain on rocks?](/sites/default/files/2019-08/what-are-the-effects-of-acid-rain-on-rocks.jpg)
What are the effects of acid rain on rocks?
Hands-on Activities
Learn about the chemical reaction that happens between acid rain and limestone.
![Biofuel concept](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/biofuel-concept.jpg?itok=mGz1FUEJ)
What are the Pros and Cons of Ethanol Biofuel?
STEM Explained
Biofuels like ethanol might help fight climate change. But they can contribute to food insecurity and greenhouse gases in ways that might surprise you.
![Screen captures from embedded Kurzgesagt – In a Nutshell videos](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/pros_cons_nuclear_energy.png?itok=NVvZ7d08)
What are the Pros and Cons of Nuclear Energy?
STEM Explained
These two “point-counterpoint” videos provide arguments for and against using nuclear energy to generate electricity.
![Weather Vane](/sites/default/files/styles/resource_card_image_360x300_/public/2019-12/weather_vane.jpg?itok=JUERBD4o)
Tools: Weather Instruments
Picture Collections
15 images of various instruments such as rain gauges, wind vanes and weather satellites used to inform us about the weather
![Nitrogen symbol from periodic table](/sites/default/files/styles/resource_card_image_360x300_/public/2021-03/the-periodic-table-element-nitrogen.jpg?itok=bs_Xbeg4)
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?
![Cirrus Clouds Cirrus Clouds](/sites/default/files/styles/resource_card_image_360x300_/public/Cirrus_clouds_mar08.jpg?itok=R93cjlHA)
Weather: Cirrus Clouds
Picture Collections
5 images of cirrus clouds that are wispy or feather-like clouds at high level, made of ice crystals and may indicate an approaching storm
![Cold Cold](/sites/default/files/styles/resource_card_image_360x300_/public/cold.jpg?itok=g55mktjp)
Weather: Conditions
Picture Collections
11 images that illustrate some daily weather conditions such as cold, hot and windy
![International Space Station in the rays of the Sun](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/international-space-station-in-the-rays-of-sun.jpg?itok=XvahdQ2K)
Temperature on Earth and on the ISS
Backgrounders
Temperature is an important part of life on Earth and life in space. This backgrounder explains what temperature is, how it affects people and how it is controlled on the International Space Station.
![Wasted food on the ground](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/food_waste_on_ground.jpg?itok=Hpl8H3ev)
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.
![Water](/sites/default/files/styles/resource_card_image_360x300_/public/5617.jpg?itok=csETRJXO)
The Water Cycle
Picture Collections
1 diagram illustrating the water cycle
![Sunrise Sunrise](/sites/default/files/styles/resource_card_image_360x300_/public/Perth_sunrise.jpg?itok=zGCNcEx1)
Sun: Sunrise
Picture Collections
5 images of scenes showing various sunrises
![Radiation shielding garment on the International Space Station](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/ISS_radiation_shield_garment.jpg?itok=iWfQ6aCb)
Radiation and Human Space Exploration
STEM Explained
One of the greatest hazards that humans in space face is cosmic radiation. Learn what cosmic radiation is, why it's dangerous, and ways that we are looking at protecting humans in deep space.
![Ship in Arctic waters](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Ship_in_Arctic_waters.jpg?itok=vAnbppZZ)
Reaching the Arctic
STEM Explained
How will arctic ice melt from climate change affect exploration, scientific research and geopolitics?