The purpose of this study is to see how Swedish politicians speak about the concept ecology through the period 1973-1988. I’m using the theory of concepts altering meaning through history made by Koselleck. The result of this study shows that the concept ecology is under change, but I cannot see when by using Kosellecks theory. One result is an increase of politicians using ecology in debates with 163 percent between the period of 1973-1980 and 1981-1988. Another interesting result that I found was that the Swedish left party spoke more about ecology after 1981. I could also see that the Swedish politicians have been using the concept ecology contrary to the scientific definition of ecology in most cases.