{"query_echo":{"q":"","filters":{"analysis_type":["scientific evidence review"]},"warnings":[{"code":"facet_value_not_in_vocabulary","message":"Value 'scientific evidence review' for facet 'analysis_type' is not in the controlled vocabulary."}]},"total":{"value":2,"relation":"eq"},"page":1,"page_size":20,"self":"https://climateinsightsdirectory.org/api/v1/search?analysis_type=scientific+evidence+review","stability":"beta","ai_marking":{"digital_source_type":{"uri":"http://cv.iptc.org/newscodes/digitalsourcetype/trainedAlgorithmicMedia","name":"Created using Generative AI"},"notice":"Summary and key insights are generated using artificial intelligence."},"results":[{"id":"ucs-000033","url":"https://climateinsightsdirectory.org/document/ucs-000033","title":"Humans cause climate change. How do we know?","publisher":{"name":"Union of Concerned Scientists","organization":"union-of-concerned-scientists"},"document_type":"fact sheet","language":"en","date_published":"2009-07-14","source_url":"https://www.ucs.org/resources/are-humans-major-cause-global-warming","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"The document outlines how scientists use climate models, atmospheric records, and carbon isotope signatures to prove that human-induced greenhouse gas emissions are the primary driver of global warming since the mid-20th century. It highlights the consensus among the scientific community and major bodies like the IPCC, while noting that attribution science can now link specific extreme weather events to climate change.","ai_generated":true,"unit":"ucs-000033#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Atmospheric carbon dioxide (CO2) concentrations have risen from approximately 280 parts per million (ppm) in the pre-industrial era to over 410 ppm currently, reaching the highest levels seen in over 800,000 years according to ice core data.","ai_generated":true,"unit":"ucs-000033#insight-1","date_modified":"2026-10-23"},{"text":"Scientists use a specific ratio of carbon isotopes, known as δ13C, as a 'smoking gun' to distinguish CO2 produced by burning fossil fuels from other sources, confirming that fossil fuel emissions are the main cause of rising CO2 levels since the 1880s.","ai_generated":true,"unit":"ucs-000033#insight-2","date_modified":"2026-10-23"},{"text":"Observed warming patterns since the mid-20th century cannot be accurately reproduced by climate models using only natural drivers; however, they match reality when human-induced drivers are included. Human activity is responsible for more than half of the warming observed since 1951.","ai_generated":true,"unit":"ucs-000033#insight-3","date_modified":"2026-10-23"},{"text":"Attribution science has enabled the quantification of human influence on specific extreme weather events. For example, climate change at least doubled the risk of the 2003 European summer heat wave and made the record-breaking precipitation of Hurricane Harvey in 2017 three times more likely and 15 percent more intense.","ai_generated":true,"unit":"ucs-000033#insight-4","date_modified":"2026-10-23"},{"text":"There is a strong scientific consensus, with at least 97 percent of scientists agreeing that human activity is the primary cause of global warming, a position supported by the 2018 US National Climate Assessment and the Intergovernmental Panel on Climate Change (IPCC).","ai_generated":true,"unit":"ucs-000033#insight-5","date_modified":"2026-10-23"}],"climate_tags":["greenhouse gas emissions","carbon dioxide","fossil fuel","climate modeling","extreme event attribution","extreme weather event","Paris Agreement","climate justice","renewable energy commercialization"],"geography_discussed":["United States","Europe","Paris","London","Texas"],"frame_perspective":[],"analysis_type":["scientific evidence review","fact sheet"]},{"id":"wri-000720","url":"https://climateinsightsdirectory.org/document/wri-000720","title":"Statement To the U.S. House of Representatives Committee on Energy and Commerce","publisher":{"name":"World Resources Institute","organization":"world-resources-institute"},"document_type":"statement","language":"en","date_published":"2009-01-15","source_url":"https://www.wri.org/publications/statement-us-house-representatives-committee-energy-and-commerce","generator":"Climate Insights Directory","generated_fields":["summary","key_insights","climate_tags","geography_discussed","analysis_type"],"summary":{"text":"In a statement to the U.S. House Committee on Energy and Commerce, World Resources Institute President Jonathan Lash advocates for immediate national climate legislation. He cites accelerating climate impacts, such as record Arctic sea ice loss and pine beetle outbreaks in British Columbia, as evidence of the need for urgent action. The statement proposes an economy-wide, market-driven cap-and-trade program combined with investments in energy efficiency, grid modernization, and carbon capture to stimulate economic growth and ensure technological competitiveness.","ai_generated":true,"unit":"wri-000720#summary","date_modified":"2026-10-23"},"key_insights":[{"text":"Current climate trends are accelerating faster than previous models predicted, with observed consequences resulting from 0.8 degrees centigrade of warming and projections trending toward the high end.","ai_generated":true,"unit":"wri-000720#insight-1","date_modified":"2026-10-23"},{"text":"Specific environmental indicators demonstrate rapid change: Arctic sea ice reached a record low of 4.13 million km2 from June through September 2007, and mountain pine beetle outbreaks in British Columbia impacted 13 million hectares by 2007, with projections suggesting 78% of pine volume could be killed by 2015.","ai_generated":true,"unit":"wri-000720#insight-2","date_modified":"2026-10-23"},{"text":"The U.S. Climate Action Partnership (US CAP) recommends an economy-wide, market-driven approach centered on a cap-and-trade program with specified greenhouse gas emission limits, cost-containment measures, and federal funding for technology research and deployment.","ai_generated":true,"unit":"wri-000720#insight-3","date_modified":"2026-10-23"},{"text":"To achieve a low-carbon transition, the U.S. should prioritize energy efficiency in buildings, modernization of the electric grid, stimulation of low-carbon electricity, deployment of carbon capture and storage for coal-fired plants, and improvements to transportation efficiency.","ai_generated":true,"unit":"wri-000720#insight-4","date_modified":"2026-10-23"},{"text":"U.S. domestic action is necessary to maintain global technological competitiveness and should not be contingent on the actions of other countries, given the U.S. is the largest historical contributor to temperature and greenhouse gas increases.","ai_generated":true,"unit":"wri-000720#insight-5","date_modified":"2026-10-23"}],"climate_tags":["emission trading","greenhouse gas emissions","energy efficiency","Grid modernization","renewable energy","carbon capture and storage","low-carbon economy","obsidian","forestry","vulnerability assessment","climate policy"],"geography_discussed":["British Columbia"],"frame_perspective":[],"analysis_type":["policy recommendation","scientific evidence review"]}]}