Under the Paris Agreement, countries are invited to communicate “mid-century long-term low greenhouse gas emissions development strategies” (long-term strategies, or LTS). These strategies are central to the goal of limiting global warming to well below 2°C and to pursue efforts to limit the increase to 1.5°C, representing a significant opportunity for countries to lay out their vision for achieving a low-carbon economy by 2050 while also pursuing sustainable development. It is advantageous for countries to align their NDCs and long-term strategies for consistency and to avoid the lock-in of carbon-intensive behavior, technologies and policies. This dataset is published via Climate Watch, a free online platform designed to empower policymakers, researchers, media and other stakeholders with the open climate data, visualizations and resources they need to gather insights on national and global progress on climate change. All the inventories on Climate Watch are based on this production-based accounting.