Some key numbers that every effective altruist should know
Sample (from 94 notes)
|Front||What is the age of Earth?|
|Back||4.54 billion years.|
|Source||"The age of Earth is estimated to be 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%). This age may represent the age of the Earth's accretion, or core formation, or of the material from which the Earth formed. This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples." (Wikipedia)|
|Front||In what year did the world population reach 4 billion?|
|Source||Our World in Data.|
|Front||How much money has Animal Charity Evaluators moved?|
|Back||$26.4 million (2014–2019).|
|Source||Animal Charity Evaluators.|
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