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I don't understand how communication has broken down so badly - I'll take the blame and assume it is just my communication skills failing here, because I've never seen anyone unable to grasp the concept of return on investment before. That's the line! If you are making decisions about energy usage, determining whether an activity or idea returns a net positive amount of energy or a net negative amount is extremely useful. Let's use a solar panel for example - you have to invest energy and work in order to transform a bunch of raw materials into a solar panel and then install it, so you count the cost of those inputs. While the solar panel is fuelled by the sun, you don't have to give a shit about the energy costs required to make the sun keep burning - those are entirely irrelevant. In contrast, if you set up a petroleum-based generator, you have to care not just about the costs of building the generator, but the cost of supplying it with fuel as well, because that fuel does not shine down out of the sky for free.
I just don't understand why this is so difficult to grasp or understand and at this point I'm giving up - this is my last post in this thread because this is just not productive. My line that you consider strained and implausible has been used by scientists for decades in multiple peer-reviewed papers and it is a widely accepted measure among anyone who takes the topic seriously. Your incredulity at this extremely common and well-understood concept just mystifies me.
Depends on what you're trying to do, but yes, you should care about calories - but you should care about nutrition as well. Having concerns about one thing shouldn't prevent you from having concerns about something related.
Look out the window - especially if you're near a coral reef. Were you aware that there are microplastics in your balls? In your brain? The biosphere is in crisis and there's vast quantities of trash and pollution that are degrading the environment and quality of life both. We didn't have to abandon those old predictions at all - but atmospheric carbon levels are a better proxy for that kind of activity than directly measuring all the regular pollution. You don't have to abandon that old prediction at all and you can keep studying it or verifying it if you want to - it's just that atmospheric carbon is a better measure, so we use that instead. If you want to go out and discover an actual method for accurately measuring harmful pollution, please do - it'd be a tremendous service to humanity.
You wait a bit and watch the trend-line on the graph. Alternatively, you find some explanation for those temporary shifts up and down - as an example, volcanic eruptions can have a significant impact on temperature levels across the globe, so if you can say "we're experiencing lower temperatures because this volcano erupted and filled the atmosphere with vog" that lets you work it out as well.
If you have a bank account with 5000 dollars in it and which will only be refreshed with another 5000 dollars in 10 years, there is a big difference between having a yearly expenditure of 1000 dollars as opposed to a yearly expenditure of 400 dollars.
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