We exist because we all have a purpose, sometimes in life humans face challenges that contemplates past decisions and their future; they contemplate life. we exist to fulfill our dreams, without a dream, without a goal we can’t fulfill it. we exist from our mother womb, and born into a world of life. so to say “why do we exist” we exist to create dreams and goals. to fulfill them, to experience life.
I can’t give factual information on this but I can give you a example
Some time a few years ago a bunch of Christians surrounded a Muslim man to protect him from a oncoming crowd while not to long from then a bunch of Muslim people surrounded a Christian man
M = - 3
16m - 12 - m + 5 = - 52
16m - m = - 52 + 12 - 5
15m = - 45
m = - 45/15
m = - 3 ✔️
The only disadvantage I could think of would be price of equipment needed to produce energy from the source (i.e. price of solar panels)
Temperate climate zone, because big cities don't function well during the arctic winter, nor summer actually