Wildlife
Pollution
Energy
Recycling
Environmental activism
100
This term describes the excessive harvesting of fish.
What is overfishing?
100
This type of waste includes old smartphones, batteries, and computers, which contain hazardous materials.
What is hazardous electronic waste?
100
What are wind farms composed of?
What are wind turbines?
100
This three-word phrase is often used to encourage sustainability: Reduce, Reuse, and ___.
What is Recycle?
100
What is this person in the picture called?
What is a lumberjack?
200
True or false: American mink is an invasive species in Estonia.
What is true?
200
The thinning of this protective layer lets more harmful UV rays reach the Earth.
What is the ozone layer?
200
Name 3 most common renewable energy sources.
What are wind power, solar power, and hydropower?
200
This term refers to the process of turning old products into new ones.
What is upcycling?
200
This type of farming grows food without synthetic pesticides or fertilizers, focusing on sustainability and healthy soil.
What is organic farming?
300
True or false: Sumatran Rhino is on the verge of extinction.
What is true?
300
Cities with high levels of smog often see increased cases of asthma due to this type of pollution.
What is air pollution?
300
What is the most harmful energy source for the environment?
What is coal?
300
Name 4 things that are commonly recycled.
What are paper, plastic, metal, and glass?
300
This political party is often associated with environmentalism and sustainability.
What are the Greens?
400
___ is the largest nature reserve in Estonia.
What is Alam-Pedja?
400
What is a phenomenon caused by emissions like carbon dioxide, which traps heat in the Earth’s atmosphere and leads to global warming?
What is the greenhouse effect?
400
As of 2025, approximately this many nuclear reactors are operating worldwide.
What are 440 nuclear reactors?
400
How would you describe materials that naturally decompose and return to the earth without causing harm?
What is biodegradable?
400
Reducing waste by reusing materials and recycling is a key part of this type of environmental care.
What is waste management?
500
This mammal is the most endangered in Estonia.
What is the Eurasian otter?
500
This is the term for gases released from vehicles and factories that lead to smog and acid rain.
What are exhaust fumes?
500
This country is home to the world's largest nuclear power plant, which has a massive capacity of 7,965 MW. Although the plant has been mostly offline since 2011, it remains the biggest in total capacity.
What is Japan?
500
This toxic material, commonly found in batteries and electronics, can be harmful if not disposed of properly, but it can be safely recycled and reused.
What is mercury?
500
Earth Day is celebrated on ___ every year.
What is April 22nd?