Climate Change
Pollution
Recycling
Ecosystems & Biodiversity
Actions & Solutions
100

This gas is the most abundant greenhouse gas produced by human activities. 

What is carbon dioxide?

100

Litter, chemicals, and smoke that harm the environment.

What is pollution?

100

This "recycling" turns organic waste into this nutrient-rich substance for soil.

What is composting?

100

A forest, pond, or desert with all its living and non-living parts interacting together.

What is an ecosystem?

100

Recycling and composting are great, but this “R” comes first because it’s the best way to limit waste in the first place.

What is reduce?

200

The rising average global temperature leads to more frequent and intense storms, droughts, and heatwaves.

What is climate change?

200

Oil that spills into oceans or rivers coats animals and plants, disrupting ecosystems. 

What is oil pollution (or spills)?

200

Aluminum cans, glass bottles, and cardboard boxes can all be processed and used again.

What is recycling?

200

A species that no longer exists anywhere on Earth.

What is an extinct animal (or species)?

200

These kinds of cars produce zero tailpipe emissions and run on rechargeable batteries instead of gasoline.

What are electric vehicles/cars (or hybrid vehicles/cars)?

300

The melting of glaciers contributes to rising sea levels. Glaciers are primarily found in these two regions of the Earth.

What are the polar regions (Arctic and Antarctic)?

300

Certain factory gases and chemicals can damage this protective atmospheric layer, increasing the amount of harmful UV radiation reaching the Earth.

What is the ozone layer?

300

This term describes products designed so they can be reused or recycled at the end of their life cycle.

What is sustainable design?

300

Bees, butterflies, and birds that help plants reproduce by carrying pollen.

What are pollinators?

300

Installing solar panels, using LED bulbs, and unplugging electronics are all ways to reduce this environmental measure.

What is carbon footprint?

400

The increase of this gas in the atmosphere has caused ocean temperatures to rise and coral bleaching to become more frequent.

What is carbon dioxide (CO₂)?

400

When industrial waste spills into soil, it reduces fertility and harms plants, animals, and humans.

What is soil contamination?

400

Some plastics are difficult to recycle because they break down into tiny pieces and mix with other materials, creating this environmental problem.

What are microplastics (or microplastic contamination)?

400

When non-native species spread rapidly and harm local ecosystems.

What are invasive species?

400

Some governments use this financial mechanism to tax pollution and reward cleaner practices, pushing industries toward greener production.

What is a carbon tax (or environmental tax)?

500

Scientists use this layer of ice in Antarctica to study Earth's past climate by analyzing trapped air bubbles.

What is an ice core?

500

When fertilizers or sewage wash into rivers and lakes, they cause algae to grow excessively, which can suffocate aquatic life. 

What is eutrophication?

500

Plastic made from renewable materials like corn starch or sugarcane, which can biodegrade under specific conditions.

What is bioplastic (or biodegradable plastic)?

500

Species that are found only in one specific geographic area, such as lemurs in Madagascar.

What are endemic species?

500

Farmers who plant cover crops between growing seasons improve soil health and prevent erosion.

What is regenerative agriculture?