This book is the result of a ministry-level study entitled "Changing the Livelihoods of Some Ethnic Minorities in the Northwestern Region of Viet Nam under the Impacts of Climate Change". The content of this book consists of 5 main sections: 1. Research overview, theoretical foundations, concepts, theories, and research methods. 2. Overlooking the mountainous area of northwestern Vietnam. 3. Identifying climate change in the mountainous area of northwestern Vietnam. 4. Impacts of climate change on the livelihoods of some ethnic minorities in the mountainous area of northwestern Vietnam. 5. Changes in the livelihoods of some ethnic minorities as a response to and adaptation to climate change.