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That doesn't invalidate the principle.

A heat pump locks away a few kg of co2. While (more importantly) lowering the other side of the equation.

I'm not advocating it as a one stop solution to climate change, just that it does in fact sequester a few kg of co2.

It won't be permanent sequestration, though, or even necessarily long term. When these units are retired, their contained volume of CO2 will be reintroduced to the air, one way or another. In terms of scale, even several kgs of CO2 per person taken as a sum would still be a rounding error.

I suppose technically you are correct: a vanishingly small amount of CO2 is captured temporarily in units like these. It just doesn't matter for the issues where we need it to matter.

Well assuming we don't find anything better than heatpumps then homes will have a heatpump forever, so while your current heatpump might not sequester its co2 permanently, your heatpumps and your childrens heatpumps will effectively sequester co2 permanently.

An LED bulb saves ~5kg of CO2 a year v an incandescent. Is switching to that led bulb worth it? or is it too small to matter and not worth doing?

With current industrial processes, they usually will use some chemical reaction to create new CO2 because the can be certain of its purity. Most methods of capturing CO2 involve changing the chemical.

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