The phrase "primary driver of climate change" refers to the main reason or factor that is mainly responsible for causing changes in the Earth's climate. Full definition
Perry has questioned the scientific consensus that carbon dioxide emissions from human activity are the primary driver of climate change. (cnbc.com)
Rep. Brian Babin (R - Texas), who sits on the House Science, Space and Technology Committee and has rejected the mainstream scientific view that humans are the primary driver of climate change, was trapped in his Houston house by Harvey's floodwaters. (scientificamerican.com)
Carbon dioxide (CO2) from fossil fuel combustion is the primary driver of climate change, and many governments, companies and citizens are making efforts to curb their emissions. (sciencedaily.com)