The default search option in the catalog is to use keywords but all results may not be relevant. To focus a search more look at the Subjects listed at the bottom of a catalog record and click on it. The resulting search will yield books that are primarily about that specific subject. Here are some subject headings related to climate change.
Climatic Changes (add a subcategory if you wish such as a geographical place, economic aspects, government policy, social aspects, etc.)
Global Temperature Changes Renewable Energy Sources Electric Vehicles
Global Warming Biomass Energy Green New Deal
Global Environmental Change Ocean Energy Sources Deforestation
Greenhouse Gas Tidal Power Environmental Refugees
Vegetation and Climate Wind Power Plant
Plants, Effects of Global Warming on Solar Energy
Biodiversity - Climatic Factors Sea Level
Climate Change Mitigation Fossil Fuels