Eco Life Fair MINATO 2026  Eco Quiz Rally Answers

１．Seikatsu Club Machi Minato

Quiz

Which type of household waste has the largest volume of emissions?

Choice

×　Old newspapers and magazines
×　Batteries
○　Containers and packaging

Explanation

Among household waste, the biggest prpblem is containers and packaging. According to the Ministry of the Environment’s annual survey ,the containers and packaging account for about 66% of household waste by volume, and about 50% of that is plastic.

２．Tokyo Water Co., Ltd., Minato Sales Office

Quiz

Of all the water on Earth, about what percentage is water in lakes and rivers that we can use relatively easily for drinking and other purposes?

Choice

○　0.01%
×　1%
×　10%

Explanation

Earth has about 1.4 billion km³ of water. About 97.5% is seawater, and only 2.5% is freshwater. Most freshwater is frozen in the Arctic and Antarctic. Only 0.01% is water in lakes and rivers that is readily available to us—water is a limited and precious resource.

３．The Japan Plastics Industry Federation

Quiz

Which of the following is used as a raw material for “biomass plastics”?

Choice

×　Stone
○　Plants
×　Iron

Explanation

“Biomass” refers to biological resources such as plants and living creatures found in nature. “Biomass plastics” are plastics that use biological resources such as plants or microorganisms as raw materials.

４．Global Warming Prevention Subsection, Environmental Section, Environment and Recycling Support Department, Minato City

Quiz

Efforts to reduce the impacts of climate change are called “mitigation.” What are efforts to protect our lives and livelihoods from damage called?

Choice

×　Health measures
○　Adaptation measures
×　Disaster prevention measures

Explanation

“Adaptation” means preparing for climate change impacts—such as extreme heat and heavy rain—and reducing damage as much as possible. Measures like preventing heatstroke and preparing for flooding caused by heavy rain are examples of adaptation that protect our lives and daily living.

５．Biodiversity Minato Network

Quiz

Which of the following is important for protecting nature and living things?

Choice

×　Releasing pets into the wild
○　Increasing greenery
×　Scattering food

Explanation

Increasing greenery expands habitats and is an important activity. Releasing animals or feeding wildlife can disrupt the balance among living things and damage the natural environment.

６．Clean Authority of Tokyo, Waste Disposal of Tokyo 23 Cities, Minato Incineration Plant

Quiz

To extend the life of the last landfill site in Tokyo’s 23 cities, what initiative is being carried out?

Choice

○　Recycling incineration ash
×　Composting waste
×　Charging fees for garbage

Explanation

If landfill continues at the current pace, the final landfill site will be full in about 50 years. To make the limited landfill capacity last longer, Minato Incineration Plant promotes recycling of incineration ash. Please help reduce waste by practicing the 3Rs.

７．Mitsubishi Motors Corporation

Quiz

Which Mitsubishi Motors vehicle can supply electricity for up to about 11 days for a typical household with one full charge and  a full tank of gasoline?

Choice

×　DELICA MINI
×　DELIMARU.
○　OUTLANDER PHEV

Explanation

Mitsubishi Motors’ plug-in hybrid “OUTLANDER PHEV” can use stored electricity as an emergency power source during outages. A full charge can supply up to about one day of electricity of a typical household, and with engine-generated power, it can supply up to about 11 days.

８．Tokyo Metropolitan Central Library

Quiz

Among the eco-themed “independent research cards” exhibited at this booth, which theme is NOT available ?

Choice

×　Check our household waste
○　Eat with handmade chopsticks
×　Furoshiki: a wrapping cloth for anything

Explanation

At Tokyo Metropolitan Central Library, we have an eco-themed display on the 2nd floor (social and natural sciences) in conjunction with Eco Life Fair MINATO. We also hold an ukiyo-e stamp rally where participants can receive original goods—please come and join us!

９．Minato Recycling and Waste Cooperative

Quiz

Cans collected as recyclables are sorted into steel and aluminum cans. Which method is used?

Choice

×　Shape
○　Magnetic force
×　Weight

Explanation

Many cans (coffee, beer, etc.) look similar. The most efficient method is to place them on a moving belt conveyor and use strong magnets during the process to separate steel cans from aluminum cans.

10．TEPCO Power Grid, Inc., Ginza Branch

Choice

In the past, there was a plan to generate electricity in Oze National Park. Which generation method was planned?

Choice

×　Thermal power generation
×　Geothermal power generation
○　Hydropower generation

Explanation

Oze receives heavy snowfall in winter and has abundant water. Surrounded by mountains over 2,000 meters high, it has a bowl-like terrain where water gathers easily—making it well-suited for hydropower. That is why a hydropower plan was once proposed.

11．Takanawa Gateway Incorporated Association Area Management

Quiz

If honeybees disappeared from the world, what impact would we experience?

Choice

×　Temperatures would rise
×　Mosquitoes would increase dramatically
○　Vegetables and fruits would decrease

Explanation

Honeybees not only collect nectar, but also help pollinate fruits and vegetables essential to our daily diet. If honeybees disappear, many foods could also disappear. Protecting honeybees is considered important for humans as well.

12．Nippon News-Ink Co.,Ltd.

Quiz

How tall can reeds (yoshi), perennial plants that grow in clusters along ponds, marshes, and riverbanks around the world, grow in a single year?

Choice

×　50 cm
×　1 meter
○　Over 2 meters

Explanation

Reeds begin sprouting in late April and grow rapidly until around June, continuing to grow until late July. They typically reach about 2–3 meters. In some areas, they can grow to about 5 meters, and some in the world reach 6 meters.

13．TOKYO GAS Co., Ltd., Tokyo Naka Branch

Quiz

What is the name of the “future city gas” that the industry is working to develop to prevent global warming?

Choice

×　Propane gas
×　Natural gas
○　e-methane

Explanation

To realize a carbon-neutral society, the city gas industry is working to develop “future city gas” by combining hydrogen made from renewable energy with captured carbon dioxide. This gas is called “e-methane.”

14．Student group “Pamily”

Quiz

Which of the following is an environment-friendly plastic that can be chemically decomposted?

Choice

×　Eco plastic
○　Green plastic
×　Clear plastic

Explanation

Green plastic does not generate harmful substances (such as carbon dioxide) when it is decomposted. It degrades in a shorter time than the other plastics and is less likely to remain in the environment.

15．Minato Eco Plaza

Quiz

Cotton is used in many products such as T-shirts and towels. What is Japan’s approximate self-sufficiency rate for cotton?

Choice

○　0%
×　20%
×　40%

Explanation

Japan’s cotton self-sufficiency rate is almost 0%, meaning it relies on imports. Cotton farming can reguires large amounts of pesticides, raising environmental and labor concerns. Eco Plaza promotes a cotton project as one step toward changing this situation.

16．Panasonic Electric Works Co., Ltd.

Quiz

Generating electricity with solar power can help prevent the Earth from becoming _____. Which word fits the blank?

Choice

×　cooler
○　warmer
×　space-like

Explanation

Using solar power reduces the need to burn coal and other fuels that emit carbon dioxide. Carbon dioxide is a major cause of global warming.

17．Waseda University Environment Rodorigues Precious Plastic Waseda

Quiz

When sorting PET bottles, what is the correct way to handle the cap?

Choice

×　Throw it away with the bottle attached
○　Remove the cap and dispose of it separately
×　Put it in burnable trash

Explanation

The bottle and the cap are made of different materials. Therefore, separating them is important for recycling.

18．WWF Japan

Quiz

Which of the following is WWF’s “CO₂ emissions reduction target by 2050”?

Choice

×　Reduce by 50% from today
○　Reduce by 100% from today (net zero)
×　Reduce by 30% from today

Explanation

To reduce and maintain global warming to 1.5°C, global CO₂ emissions need to reach net zero (a 100% reduction) by 2050. WWF makes policy recommendations to governments, companies, and local authorities to help achieve this.

19．Minato Eco-Conscious Consortium (mecc)

Quiz

How is global warming expected to affect animals and plants?

Choice

○　Some animals and plants may become extinct
×　It will have no particular impact
×　The variety and number of species will increase

Explanation

Rising temperatures can affect the survival and growth of organisms, and can also reduce the availability of food sources. As a result, some species are thought to be extincted.

20．PAL System Tokyo, Minato Akebono-kai

Quiz

No one likes seeing litter. What is the system called where the store takes back the container you drank from at the store where you bought it?

Choice

×　Recycle
×　Reuse
○　Deposit

Explanation

Recycle means collecting items to process and reuse them. Reuse means washing and using items as they are repeatedly. With a deposit system, a refundable amount is added at purchase and returned when the container is brought back to the store.

21．Community Development Section, Azabu Regional City Office, Minato City

Quiz

Some succulents include spiny cacti. Which desert animal can eat these very spiny cacti?

Choice

×　Sand cat
○　Camel
×　Gazelle

Explanation

Camels have rows of hard, cone-shaped projections in their mouths that help them align food in one direction and swallow cactus spines. Their upper palate is also hard and helps grind the spines.

22．All Tokyo 62 “Green Tokyo – Global Warming Prevention Project”

Quiz

How many cities, wards, towns, and villages are there in Tokyo in total?

Choice

×　33
×　50
○　62

Explanation

Tokyo has 62 municipalities. Each has its own environmental initiatives, and connecting and combining them makes the overall impact stronger.

23．Minato Recycling and Waste Management Office

Quiz

About how much combustible waste is generated in Minato City in one day?

Choice

×　About 1.25 tons
×　About 12.5 tons
○　About 125 tons

Explanation

Minato City generates about 125 tons of combustible waste per day—roughly equivalent to 21 African elephants (about 6 tons each). To use limited resources wisely, let’s practice the 3Rs (Reduce, Reuse, Recycle).

24．Minato 3R Promotion Action Conference

Quiz

Minato City has three characters that promote the 3Rs (Reduce, Reuse, Recycle). Which character represents “Reduce (avoid producing waste)”?

Choice

○　Danjirō (Danjiro / 断辞郎)
×　Riyūsuke
×　Ekoru

Explanation

In the name “Danjirō (断辞郎),” “Dan (断)” means to refuse unnecessary items, and “Ji (辞)” means to decline disposable items such as plastic shopping bags. The name reflects the idea of reducing waste by saying “no.”

25．Arisu-no-Mori Honeybee Club

Quiz

Where does the honey harvested by Arisu no Mori Honeybee Club come from?

Choice

○　Arisugawa-no-miya Memorial Park
×　Ueno Park
×　Inokashira Park

Explanation

Honeybees are said to collect nectar from flowers within a 2 km radius of their hives. Because flowers and locations change with the seasons, the bees collect nectar not only from Arisugawa-no-miya Memorial Park but also from nearby street trees and gardens.

26．Specified Nonprofit Corporation Halo-Halo

Quiz

In Filipino, what does “halo-halo” mean?

Choice

○　A mix of many different things
×　Hello
×　Thank you

Explanation

There is a Filipino sweet called halo-halo, made by mixing shaved ice, fruits, ice cream, and many other ingredients. Our organization also aims to bring together diverse cultures and people to carry out a variety of activities.

27．Minato Liaison Committee of Consumers' Organizations

Quiz

Compared with 30 years ago, how has air pollution changed today?

Choice

○　It has become cleaner
×　It has become dirtier
×　It has not changed

Explanation

Stricter vehicle emission regulations and the increase of hybrid and electric vehicles have reduced emissions of pollutants such as nitrogen compounds and carbon dioxide. As a result, the air has become cleaner compared with 30 years ago.

28．Azabu Cleaning Cooperation Association, Akasaka Aoyama Cleaning Cooperation Association

Quiz

After PET bottles are recycled, which product is made the most?

Choice

○　PET bottles
×　Sheets used for food trays or desk mats
×　Fiber used for clothing and bags

Explanation

Of the products made from recycled PET bottles, about 50% become PET bottles again, about 30% become sheets, and about 7% become fiber used domestically.