350.org is a global grassroots organization dedicated to addressing climate change by advocating for a safe level of carbon in the atmosphere, specifically below 350 parts per million. The organization mobilizes individuals to campaign for universal access to clean energy and the cessation of fossil fuel use. Through local organizing, 350.org aims to achieve measurable reductions in fossil fuel emissions while empowering the climate movement for greater future impact. The organization fosters a data-driven culture to support its mission, emphasizing the importance of data in decision-making and strategic planning.