Wallace Stevens and William Carlos Williams are not typically considered environmental poets. However, both engage in important aspects of the debate over human relationships with nature. This thesis examines the development of each poet's unique environmental poetics in order to create a more widely applicable definition of ecological poetry. By examining the development of ecocentrism in Stevens's poetry, the gap between human perception and reality begins to close. This development then facilitates the development of Williams's sustainable language and allows him to create ecopoetry that expresses nature accurately. The connection between these two developing methodologies demonstrates that ecopoetics relies upon ecocentrism. Ecological poetry requires this drastic shift in perception in order to enact a linguistic reformation from the anthropocentric symbolism of conventional language and embody a language of nature.