A lot of people are concerned by climate change, but often they don't go far enough and they want to think that simple solutions could solve complex problems!
But it only requires some elementary maths to understand how wrong it is:
Word wide Energy production in 2015 = 282 PWh (24 Gtoe)
One photo-voltaic panel can generate 100 W during 7 hours = 700 Wh / day, so it can generate 250 KWh in 1 year
To generate 282 PWh we would need more than 1 trillion photo-voltaic panels (10^12 or 1,000,000,000,000)
And this number has to be multiplied by roughly 20 to account for decentralized power networks, energy storage and charge factor at night time for example!
So, we need roughly 20 trillions photo-voltaic panels to produce our yearly energy without burning fossil fuels!
- Problem 1: where do we get the energy to mine, transform the materials, build the panels, transport them and install them?
- Problem 2: where do we get all the material to build them?
- Problem 3: where do we store so much energy?
- Problem 4: where do we get the money to pay for these 20 trillions photo-voltaic panels?
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