Humans in the world: 7×10^9
Spanish: “En 2011 se alcanzaron los 7.000 millones (7 millardos) de humanos en el mundo. En noviembre de 2017 se contabilizaron 7.350 millones”.
English: “In 2011, 7,000 million (7 billion) of humans were reached in the world. In November 2017, 7,350 million were recorded.”
Source: Wikipedia in English
https://en.wikipedia.org/wiki/World_population
Source: Wikipedia in Spanish
https://es.wikipedia.org/wiki/Poblaci%C3%B3n_mundial
Number of neurons in the human brain: 86×10^9
Spanish: “Hay unos 86.000 millones de neuronas en el cerebro humano, de las cuales unos 16.000 millones están en la corteza cerebral”.
English: “There are about 86 billion neurons in human brain, of which about 16 billion are in the cerebral cortex.”
Source: Wikipedia in English
https://en.wikipedia.org/wiki/List_of_animals_by_number_of_neurons
Land animals farmed (and killed) for food every year: 70×10^9
Spanish: “Cada año se matan más de 70 mil millones de animales terrestres de granja para consumo”.
English: “Every year, more than 70 billion land animals are farmed (and killed) for food.”
Source: Sentience Politics
https://sentience-politics.org/philosophy/altruism-numbers-factory-farms
Fish caught every year: between 0.97×10^12 and 2.7×10^12
Spanish: “Entre 0,97 y 2,7 billones de peces (es decir, entre 970.000.000.000 y 2.700.000.000.000 peces) son capturados en su medio natural cada año en todo el mundo”.
English: “Between 0.97 and 2.7 trillion fish (ie 970,000,000,000 to 2,700,000,000,000) are caught from the wild globally each year.”
Source: FishCount
http://fishcount.org.uk/fish-count-estimates
Insects: between 1×10^18 and 10×10^18
Spanish: “La población mundial de insectos se estima en alrededor de 1 a 10 trillones (aproximadamente mil millones de insectos por cada humano)”.
English: “The world population of insects is estimated at around 1 to 10 billion billion — about a billion insects for every human.”
Source: Reducing Suffering
http://reducing-suffering.org/the-importance-of-insect-suffering/
http://reducing-suffering.org/la-importancia-del-sufrimiento-de-los-insectos/
