Is sun the source of all of our needs?

Answer 1

The sun has traditionally been the source of all (or the majority) of the energy on Earth including the energy required to grow food.

That is changing somewhat as we've been using fossil fuels (some of which is based on true organic matter, some of which probably is not. And, of course, nuclear energy is generated from radioactive elements from earth.

In a sense, all the matter in the solar system came from the same source 4.5 billion years ago. But, that has differentiated into the sun and the planets in the solar system.

Other than just energy, life must also have various elements to exist, hydrogen, oxygen, nitrogen, phosphorous, iron, etc. In general, these elements come from EARTH.

Plants and animals have been growing in Earth's biosphere for millions or billions of years. Utilizing the sun's energy to recycle elements in Earth's atmosphere, and the top few meters of earth's crust.

However, humans have also been mining and utilizing a number of other minerals that have been mined from near the surface of the earth, and not part of the biologic cycles.

So, one could conclude that the Sun provides the foundation for much of our energy, but certainly doesn't provide for all of our needs.