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Forests, oceans, energy and emissions: the numbers that matter for the planet.
Free questions with no sign-up, where every answer is a number. Type your estimate: the closer you get to the right answer, the more points you score.
A free game mixes every topic. To play only “Ecology & Climate”, Premium accounts can filter topics in the game settings.
Type your estimate and check it: you'll see the right answer and your points.
1
What percentage of the excess heat accumulated on Earth due to global warming has been absorbed by the oceans?
Answer: 90%
2
On average, how many liters of water are needed to produce one kilogram of hard cheese?
Answer: 5,000 L
3
What percentage of the total weight of household waste consists of compostable organic waste (peelings, food scraps)?
Answer: 33%
4
What is the average life expectancy in years of an African elephant living in the wild?
Answer: 60
5
Recycling just one aluminum can saves enough energy to power a television for how many hours?
Answer: 3 h
6
What percentage of an average household's annual electricity bill is generated by appliances left on standby mode?
Answer: 10%