Manera de representar de manera escrita la oxidación de un clavo o la combustión de Azufre:

Food can come from sustainable or unsustainable resources. why has the united nations suggested that bugs could be a better source of food than animals like pigs or cattle?

Rocks that contain crystals that are roughly equal in size and can be identified with the unaided eye are said to exhibit a texture.

Which is a result of the emission from the use of fossil fuel