Reports on the human impact on climate change:

Climate Commission - the critical decade report:
Over many decades thousands of scientists have painted an unambiguous picture: the global climate is changing and humanity is almost surely the primary cause. The risks have never been clearer and the case for action has never been more urgent. Our Earth’s surface is warming rapidly and we can already see social, economic and environmental impacts in Australia. Failing to take sufficient action today entails potentially huge risks to our economy, society and way of life into the future. This is the critical decade for action.
climatecommission.gov.au/topics/the-critical-decade/

Climate Change 2007 - Synthesis Report:
www.ipcc.ch/pdf/assessment-report/ar4/syr/ar4_syr_spm.pdf