![Carly Silver | Écologiste associée](/sites/default/files/styles/career_image/public/2019-09/Carly%20Silver.jpg?itok=DpeTJqH5)
Carly Silver
Career Profiles
Associate Ecologist
![Cartoon leaf holding an umbrella over baby plant](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/cartoon_acid_rain.jpg?itok=J4BMIwgR)
What is Acid Rain?
STEM Explained
Acid rain is any precipitation that has an unusually low pH. It can be rain, snow, fog, etc. But what is a low pH and why is this a problem?
![Solar panel project in Dakar, Senegal](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Solar_project_Dakar%2CSenegal.jpg?itok=q64WAuqV)
What are Carbon Offsets?
STEM Explained
Can carbon offsets help you reduce your environmental footprint, practice sustainable living and fight climate change?
![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.
![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.
![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?
![Red Onion, Parsnips, Lettuce Red Onion, Parsnips, Lettuce](/sites/default/files/styles/resource_card_image_360x300_/public/ropl.jpg?itok=v3BvJdhW)
Vegetables
Picture Collections
14 images of some plants such as carrots, cabbage and leeks whose roots, stems or leaves are used for food
![DNA barcoding used to test food](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/DNA_barcoding_food_testing.jpg?itok=Hidu7x3v)
The Classification of Life: From Linnaeus to DNA Barcoding
Backgrounders
Learn about two taxonomy systems that scientists use to classify the life around us.
![Cartoon mammoth](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Cartoon_mammoth.jpg?itok=yPc7tmR_)
Should Scientists Clone Extinct Species?
STEM Explained
Cloning makes it possible to bring extinct species back to life. But is that a good idea?
![Iguana Iguana](/sites/default/files/styles/resource_card_image_360x300_/public/photo-1428542244207-0aaec316e609.jpg?itok=b0mH_hlU)
Reptiles
Picture Collections
10 images of some cold-blooded vertebrates such as snakes, lizards and alligators typically having dry, scaly skin
![various marine microorganisms as they appear under a microscope](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/marine_microorganisms.jpg?itok=MgdaDkhz)
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!
![Great tits eat from a bird feeder](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Great_tits_bird_feeder.jpg?itok=aiRpq_-G)
Natural Selection in Your Backyard
STEM Explained
A study on bird feeders and beak sizes shows how an everyday human activity can affect the evolution of another species.
![Boreal Forest Boreal Forest](/sites/default/files/styles/resource_card_image_360x300_/public/photo-1434394566634-da0fa7e334b8.jpg?itok=vRRjTv2B)
Plants: Biomes
Picture Collections
9 images of plants in some large naturally occuring habitats called biomes such as tundra, grasslands and boreal forests
![Seed Germinating Seed Germinating](/sites/default/files/styles/resource_card_image_360x300_/public/Seed_germination.jpg?itok=wV7-g9v7)
Plants: Germination
Picture Collections
6 images of some seedlings sprouting as one of the stages towards full plant growth
![Early Stages Of Plant Growth Early Stages Of Plant Growth](/sites/default/files/styles/resource_card_image_360x300_/public/Plant-Growth.jpg?itok=jWd5KXkY)
Plants: Growth
Picture Collections
10 images showing some stages of plant growth from planting to sprouts growing to harvesting