Pollution. Industrialization normally adds to pollution in air, water, soil, due to the waste products it produces.
Extraction. Industrialization makes use of resources - raw materials from the land, water, perhaps wood and plants, fossil fuels, etc. This has an effect on the environment, since demand for all these goes up, and more quantities are extracted from the land.
Urbanization. Industrialization needs people to work in factories. So, people move from rural/agricultural areas, that are spread out, to industrialized cities, that are concentrated. A higher population puts added pressure on the local environment.
Waste material. Industrialization produces a greater amount of waste, both directly as a result of production of goods, as well as the disposal of those goods once their purpose has been served. For example, if a factory makes plastic furniture, it produces waste plastic … and once the plastic furniture is worn, it is added to the rubbish pile too.
Finally, there is a possible long term beneficial impact. Industrialization adds to the wealth of society, and makes a greater quantity of goods available at lower cost, thus uplifting the lives of many. If managed properly, with ill effects kept limited, this will allow humanity to have the resources to better manage the environment while having a high standard of living.