Embodied-Energy Break-Even Chart

Sustainable consumption is a thermodynamics problem before it's a shopping problem: every product carries a fixed embodied energy paid once at manufacture, and the only lever a consumer really controls is how much annual operating energy it saves and for how long it stays in service. This 2D companion plots the running energy balance Balance(t) = ΔE·t − E0 as a filled line chart, marking the exact year the manufacturing debt is repaid. Switch between a phone, a laptop and a jacket to load realistic embodied-energy baselines, then drag the embodied energy, annual savings and lifetime sliders to watch the break-even point — and the lifetime cutoff either side of it — move in real time.