...half is still much better. Besides, there's a lack of local emissions (and therefore no increased asthma risk, etc) which is often under-rated IMHO.
And you're investing in a capability that will help further reduce emissions on the grid.
Think about the Tesla Gigafactory. At first, it'll be run with electricity from the grid. That means the first batteries cost 100-200 grams of CO2 per kWh cycle (well, significantly better than that as the NMC cells last for many thousands of cycles). But as you upgrade to buffered solar (and cut off from the grid to save the monthly fee), the input energy becomes cleaner, so the next round of batteries may be just 50 grams of CO2 per kWh. And by using /those/ batteries in the next Gigafactory, its effective emissions are even less.
That's why trying to electrify everything possible while greening the grid is so important: the effects compound each other. Ultimately, no emissions are required at all. Compare that to mere efficiency improvements on conventional fossil fuel tech: sometimes the lower costs enabled by greater efficiency can actually perversely lead to GREATER emissions as demand increases non-linearly.
And you're investing in a capability that will help further reduce emissions on the grid.
Think about the Tesla Gigafactory. At first, it'll be run with electricity from the grid. That means the first batteries cost 100-200 grams of CO2 per kWh cycle (well, significantly better than that as the NMC cells last for many thousands of cycles). But as you upgrade to buffered solar (and cut off from the grid to save the monthly fee), the input energy becomes cleaner, so the next round of batteries may be just 50 grams of CO2 per kWh. And by using /those/ batteries in the next Gigafactory, its effective emissions are even less.
That's why trying to electrify everything possible while greening the grid is so important: the effects compound each other. Ultimately, no emissions are required at all. Compare that to mere efficiency improvements on conventional fossil fuel tech: sometimes the lower costs enabled by greater efficiency can actually perversely lead to GREATER emissions as demand increases non-linearly.