Monsanto Forest Park an auditorium, a space for permanent and occasional exhibitions, and a Centre of Multimedia Resources. Quercus, the largest Portuguese non-profit national environment organization for the conservation of the natural environment, is based in Monsanto Park. The intensive agricultural usage of the soils led to erosion and practically to a destruction of the original vegetation. In the 1930s, the increasing demand for construction areas led Duarte Pacheco, the then Minister for the Public Works of Portugal, to resuscitate an idea from 1868: the reforesting of the then practically bare Serra de Monsanto. The regulation for Monsanto Park was put in place
Monsanto renamed in honor of Leo Sauget, its first village president. In 1935, Monsanto bought the Swann Chemical Company in Anniston, Alabama, and thereby entered the business of producing PCBs. In 1936, Monsanto acquired Thomas & Hochwalt Laboratories in Dayton, Ohio, to acquire the expertise of Charles Allen Thomas and Carroll A. Hochwalt. The acquisition became Monsanto's Central Research Department. Thomas spent the rest of his career at Monsanto, serving as President (1951–1960) and Board Chair (1960–1965). He retired in 1970. In 1943, Thomas was called to a meeting in Washington, D.C., with Leslie Groves, commander of the Manhattan Project, and