# deepsynth / 49 - taskset: [deepsynth](https://harnessreport.com/tasks/deepsynth.md) - difficulty: difficult - category: information-synthesis - language: - runnable from the site: no - agent timeout: 3600s ## Results by harness _none yet_ ## Instruction ``` You are given a deep information synthesis question that requires gathering data from multiple web sources and producing a structured JSON answer. To analyze progress on Copenhagen Accord commitments, identify the top five EU member states (from those party to the 2009 accord) that achieved the greatest reduction in per capita CO₂ emissions. This analysis must be based on the EDGAR (Emissions Database for Global Atmospheric Research) dataset, specifically using figures that exclude LULUCF (Land Use, Land-Use Change, and Forestry). Calculate the percentage change in emissions from the 1990 reference year to 2020. The output must be a JSON object, where keys are the country names and values are the calculated percentage change, rounded to one decimal place (e.g., {"Country": -15.5}). Research this question thoroughly by browsing the web. Find relevant data from official sources (government databases, statistical offices, international organizations). Synthesize the information into a single JSON answer. Write your final answer as a valid JSON dictionary to `/app/answer.json`. The answer should be a JSON object matching the format specified in the question above (typically string keys with numeric values). Example answer format: ```json {"Country A": 1.23, "Country B": 4.56} ``` **Important:** - You should ONLY interact with the environment provided to you AND NEVER ASK FOR HUMAN HELP. - Show your work and reasoning before writing the final answer. - `/app/answer.json` should contain ONLY the valid JSON dictionary — no explanation, no markdown fencing. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp