Explain the concept of sustainable development. provide an example of sustainable development.

Sustainable development is an economic development that is conducted without depletion of
natural resources. E.g solar energy

Why the planet stays in orbit is because of inertia (object stays in motion until a force changes it’s motion) also the atmosphere and gravity!

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.