<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Classical elements typically refer to the concepts in ancient Greece of earth, water, air, fire (and sometimes aether) which were proposed to explain the nature and complexity of all matter in terms of simpler substances . Ancient cultures in Egypt, Babylonia, Japan, Tibet, and India had similar lists, sometimes referring in local languages to "air" as "wind" and the fifth element as "void". The Chinese Wu Xing system lists Wood (木 mù), Fire (火 huǒ), Earth (土 tǔ), Metal (金 jīn), and Water (水 shuǐ), though these are described more as energies or transitions than as types of material . </P> <P> These different cultures and even individual philosophers had widely varying explanations concerning their attributes and how they related to observable phenomena as well as cosmology . Sometimes these theories overlapped with mythology and were personified in deities . Some of these interpretations included atomism (the idea of very small, indivisible portions of matter) but other interpretations considered the elements to be divisible into infinitely small pieces without changing their nature . The western elements many times were considered more as shorthand for the observable states of matter, namely solid (earth) liquid (water) gas (air) and radiation or plasma (fire). In this sense, they are basically accurate . </P>

Who considered air water earth and fire as the four essential elements
find me the text answering this question