Be green

Can ecology and mathematics be combined? Of course, you'll see it soon.

​Be Green with Pre-cycling, Bartering and Zero Waste!
Poland - Türkiye - Greece

​CC BY- SA

Water is vital for life on Earth, covering 71% of the planet's surface. It regulates climate, supports ecosystems, and sustains human life. However, water resources are finite and face growing pressures from pollution, overuse, and climate change. Conservation and responsible management are crucial for ensuring water availability for future generations and maintaining the planet's health.

Water

Multiple Choice

If the average bath time is 15 minutes, and the water flow from the shower is 10 liters per minute, how many liters of water will a person use during one bath?

• 100 liters

• 150 liters

• 200 liters

• 300 liters

Multiple Choice

Compare the water usage during hand dishwashing to the water usage when using a dishwasher. If hand dishwashing uses an average of 30 liters of water, and the dishwasher uses 15 liters of water per cycle, how many liters of water can be saved by using the dishwasher for a month?

• 200 liters
• 100 liters
• 350 liters
• 450 liters

Multiple Choice

If the average hand washing time is 20 seconds, and the faucet uses 2 liters of water per minute, how many liters of water will a person use when washing hands three times a day for a week?

• 5 liters
• 14 liters
• 10 liters
• 7 liters

Multiple Choice

In the river, 100 kg of waste was found. After conducting a cleanup operation, 75% of the pollutants were removed. How many kilograms of waste remained in the river after the cleanup?

• 50 kg
• 25 kg
• 60 kg
• 40 kg

Taking care of clean air is essential for our health and the environment. By reducing emissions from vehicles and industries, planting trees, and promoting renewable energy sources, we can improve air quality. Simple actions like using public transport, carpooling, and conserving energy at home also contribute to cleaner air. Let's work together to ensure that everyone can breathe clean, fresh air for generations to come.​

Air

Multiple Choice

If the level of PM2.5 particulate matter in the air is 50 μg/m³, and the healthy level is 10 μg/m³, how many times is the air polluted?

• 5

• 4

• 3

• 6

Multiple Choice

If a car consumes 8 liters of gasoline per 100 kilometers, and CO2 emissions are 2.3 kg per liter of gasoline, how much CO2 will the car emit during a 200-kilometer trip?

• 26,8

• 36,8

• 42,5

• 38,6

Multiple Choice

If a house consumes an average of 500 kWh of electricity per month, and the production of this energy requires burning coal, emitting 1.2 kg of CO2 per kWh, how much CO2 does the house emit per month?

• 300 kg

• 700 kg

• 500 kg

• 600 kg

Multiple Choice

If a plane consumes an average of 4 liters of fuel per 100 kilometers, and CO2 emissions from one liter of fuel are 2.5 kg, how much CO2 will the plane emit during a 1000-kilometer flight?

• 100 kg

• 200 kg

• 150 kg

• 75 kg

Sorting residual waste is necessary to mitigate climate change.

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Waste

Multiple Choice

If an average of 2 kg of waste is produced per day in a household, how much waste will the residents produce in a week?

• 14 kg
• 10 kg
• 20 kg
• 16 kg

Multiple Choice

If thanks to waste segregation, the amount of waste has been reduced by 25%, and initially 40 kg of waste was produced per month, how much waste remains after the reduction?

• 45 kg
• 20 kg
• 35 kg
• 30 kg

Multiple Choice

If a total of 1000 kg of waste was collected and 30% of it is recyclable materials, how many kilograms of materials were successfully recycled?

• 300 kg
• 200 kg
• 500 kg
• 700 kg

Multiple Choice

If each waste bag has a capacity of 30 liters, how many bags do we need to fit 150 kg of waste?

• 5
• 8
• 6
• 3