Answer:
To tell if your diamond is real, place the stone in front of your mouth and, like a mirror, fog it up with your breath. If the stone stays fogged for a few seconds, then it's probably a fake. A real diamond won't fog up easily since the condensation doesn't stick to the surface.
People might be able to solve coal mining from harming habitats maybe by finding a new way to run trains instead of coal. or by mining for coal less.
