Here are some terms to try when looking for database articles about Climate Change
Climate Change
Global Warming
Greenhouse Gases
Renewable Energy
Fossil Fuels
Non-renewable Resources
Sea Levels
You can also try adding one of the following terms to narrow your search to a more specific aspect of Climate Change
Extinction
Environment
Solar Energy
Climate Change - Climate change is a long-term change in the average weather patterns that have come to define Earth’s local, regional and global climates. These changes have a broad range of observed effects that are synonymous with the term.(NASA)
Global Warming - Global warming is the long-term heating of Earth’s climate system observed since the pre-industrial period (between 1850 and 1900) due to human activities, primarily fossil fuel burning, which increases heat-trapping greenhouse gas levels in Earth’s atmosphere. (NASA)
Greenhouse Gases - Greenhouse gases are gases in Earth's atmosphere that trap heat. They let sunlight pass through the atmosphere, but they prevent the heat that the sunlight brings from leaving the atmosphere. The main greenhouse gases are: Water vapor. Carbon dioxide.(From NASA)
Global Warming and Climate Change from Opposing Viewpoints
Global Climate Change: Vital Signs of the Planet (from NASA)
What is Climate Change (from The United Nations)
IPCC - Intergovernmental Panel on Climate Change, a body representing the United Nations