If 'carbon negative' and 'carbon positive' are terms used interchangeably to mean completely opposite things, what are alternative terms that clarify the difference without confusion?
For example, could alternative terms like "carbon reducing" and "carbon increasing" make it more clear and avoid misinterpreting which means which?
I've seen it, I think, on some brand of milk, where the advertising on their bottles said they planned to go "carbon positive" by some year. Unless they were just being intentionally sneaky in an attempt to sound good while promising to do nothing.
It sounds like OP has heard people say "carbon negative" to mean that something outputs more CO2 than it consumes, and vice versa, which is contrary to how I hear the terms used.
Carbon credit and debit in double entry book keeping. Genius. It's likely how an actual carbon credit system would work and the entire reason for the confusion.
How about "positive carbon negativity" and "negative carbon positivity"? As a bonus, this allows us extra terms such as "negative carbon negativity" and "positive carbon positivity" which can be similarly confused for each other!
(On a more serious note, "carbon reducing" and "carbon increasing" are good.)
(Net) reducer/increaser make sense, yes. I haven't seen "carbon positive" a lot: in reality, we assume most of our activity frees CO2 (or whatever else), so it's almost redundant to point out. When it doesn't, or actually causes a net reduction in whatever pollutant, that's a Big Deal and we needed a term for it. There's not much practical room for confusion: same as how a "positive" medical finding might be really bad news, it's all context.