Today’s businesses have a huge impact on the environment. Enterprises overuse available natural resources, and emit hazardous pollutants; thus, they contribute to the advancing degradation of existing ecosystems, causing serious threats to the biological diversity of our planet. Hence, there is an urgent need to undertake diverse actions to reduce the adverse impact of businesses, households, and whole societies on the environment, and stop its degradation. The goal of this paper is to present research findings from the study carried out in 2019 and compare these findings with the study carried out in 2009, in order to identify and analyze the most frequent environmental activities undertaken by enterprises operating in the Lublin region. The ranking method was used in the study. The research findings show that over the last 10 years respondents’ opinions on the most effective economic instruments used in pursuing ecological policies remained unchanged. Moreover, respondents point to numerous tangible benefits resulting from ecological activity. In 2019, like in 2009, most pro-ecological investments were financed with enterprises’ own funds. Over the 10-year period between 2009 and 2019, the most frequent pro-environmental activities, as well as the returns on ecological investment periods, have changed. The study showed that enterprises responsibly consider environmental impacts of their activities and undertake actions aimed at preserving the environment and its resources.