At present there are many environmental anxieties related to pollution, species extinction, climate change, acid deposition and many others. However, environmental anxieties are nothing new and were also experienced during the colonial period of the 19th and early 20th century. Colonial authorities and settlers in the British Empire encountered unfamiliar environments and the combination with environmental changes caused by their activities led to widespread environmental anxieties. The most important concern was anxiety over climate change. In 19th century debates surrounding this issue, highly emotive, highly alarmist arguments were made that are very similar to the ones used today. In this episode, James Beattie, Senior Lecturer at the Department of History of the University of Waikato in New Zealand explores these anxieties of settlers, scientist and colonial officials in India, Australia and New Zealand.