This line chart displays temperature over time in San Francisco, using data from the Data Canvas - Sense Your City API, loaded via `d3.csv` in React. D3’s `scaleTime` and `scaleLinear` map timestamps and temperature values to SVG coordinates. The `d3.line` path with `curveNatural` connects the points, and circles with `<title>` tooltips mark each observation. Axes are custom React components rendering ticks with `d3.ticks`.