We don’t produce enough and we don’t produce it efficiently.
Consider a small car say 100 horsepower or 75 kWatts. The power output of a normal human will be around 200-250W and an elite athlete can perhaps sustain an output of 400-500W over several hours.
A small car uses more power than 150 people can produce. Even a single room heater (1.5 kW) uses more power than 3-4 people can sustain. The amounts simply don’t work out. Just cars alone – there are around 1 billion cars in use today. If every car needed the output of 100 people, there would need to be a way to have 100 billion people’s worth of power simply to operate our cars. (the world population is 8 billion)
There are plants like oil palms that produce a lot of oil. Even so, it would take massive plantations (the size of several medium sized countries) to produce enough oil to sustain the world’s consumption.
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