This project is about the creation of a bilingual electronic corpus on environmental sciences as a source of study, research and translation. The textual corpus is delimited according to Suárez (2004), because it takes into account medium, medium-high and high specialized leveled articles from which contexts containing the terms, make up the bilingual electronic corpus. This tool will be hosted on the micro-site of the Instituto de Lenguas at Universidad Santo Tomás. On the site, the terms from the search will appear within their contexts together with the original source links from where they were extracted. About 10000 contexts were taken from where the term candidates were validated by terminology management systems. Thus, we are offering a tool that, in part, helps to cover the needs of those who want to look for term correspondences in parallel texts –english-spanish, spanish-english– in environmental science texts.