![Boat on a lake at sunset](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/boat-docked-on-lake-at-sunset.jpg?itok=1QlQiekK)
Humans and Freshwater Ecosystems
Backgrounders
Learn about how people impact the ecosystems of lakes and rivers.
![Scientist testing water samples](/sites/default/files/styles/resource_card_image_360x300_/public/2020-10/scientist-monitoring-water-quality.jpg?itok=d68styFY)
Careers in the Great Outdoors
Lessons
Students explore careers related to outdoors and the land and then design and build a water filter prototype.
![Some examples of biomass](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/biomass_icon.png?itok=6lz_OKwA)
Generating Electricity: Biomass
Backgrounders
Learn how biomass can be used to generate electricity.
![Ian Cook](/sites/default/files/styles/career_image/public/2021-01/Ian%20Cook.jpg?itok=L8Z4nvIF)
Ian Cook
Journeyman Sheet Metal Worker
![Coal and natural gas fueled generator near Hanna, Alberta, Canada](/sites/default/files/styles/resource_card_image_360x300_/public/2020-12/coal_power-generating-station.jpg?itok=cFUVGxpm)
Generating Electricity: Fossil Fuels
Backgrounders
Learn how energy from fossil fuels can be used to generate electricity.
![Jean Paquin outside](/sites/default/files/styles/career_image/public/2020-12/Jean%20Paquin%20RTA-web.jpg?itok=9XAoLiFz)
Jean Paquin
Water Resources Analyst Engineer at Rio Tinto
![Checking the inside of a pipe](/sites/default/files/styles/resource_card_image_360x300_/public/2020-09/checking-the-inside-of-the-pipe.jpg?itok=k10jeKDc)
Crack the Code: Water Treatment
Lessons
Students learn about the water treatment process as they complete a digital “escape room” on a Google site.
![Skyglow from a city and highway](/sites/default/files/styles/resource_card_image_360x300_/public/2020-06/night_sky_and_highway.jpg?itok=5QVvQWHE)
Light Pollution
STEM Explained
Light can be a type of pollution. Learn about the damage it causes to people and living things as well as how you can prevent it.
![Anne Simonen au travail](/sites/default/files/styles/career_image/public/2020-05/Anne%20Simonen.jpg?itok=6Km5oaX2)
Anne Simonen
Career Profiles
Civil Engineering Technologist
![Martina Bona](/sites/default/files/styles/career_image/public/2020-05/Martina%20Bona.jpg?itok=ZQ49gAeG)
Martina Bona
Career Profiles
Process Discipline Specialist
![Mussels on a rocky coastline](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/mussels-on-rocky-coastline.jpg?itok=4PnEYQCV)
Using Mussels to Monitor the Environment
STEM Explained
Mussels are a kind of invertebrate that filter food out of the water they live in. This makes them a great tool for monitoring environmental water quality and tracking bioaccumulation in aquatic food webs.
![Photo de Sheila Sadler au travail](/sites/default/files/styles/career_image/public/2020-02/Sheila%20Sadler.jpg?itok=kQFTQRgb)
Sheila Sadler
Sheet Metal Journeyperson
![Platinum crystals](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/Platinum-crystals.jpg?itok=CIVtGM1E)
Catalytic Converters
STEM Explained
Learn about how catalytic converters make vehicle emissions less harmful.
![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.