Volcanic gases can have significant effects on the environment. When released into the atmosphere, they can contribute to air pollution and the formation of acid rain. Additionally, certain gases like sulfur dioxide can lead to respiratory issues and other health problems for humans and animals. The release of greenhouse gases such as carbon dioxide and methane from volcanoes can also contribute to global warming and climate change. In some cases, volcanic gases can lead to the formation of aerosols that can impact air quality and even affect the Earth's climate.