the intercourse of a human or animal to make babies
A common resource (or the "commons") is any scarce resource, such as water or pasture, that provides users with tangible benefits but which nobody in particular owns or has exclusive claim to. A major concern with common resources is overuse, especially when there are poor social-management systems in place to protect the core resource.
Chemical energy into kinetic energy
carbon, hydrogen<span>, </span>oxygen<span>, </span><span>nitrogen</span>
