No, that's not even slightly a "scientific question". It is 100% misdirection and a *** argument. Nobody in the real discussion has ever asked for zero emissions "tomorrow". The most common target date for zero emissions is 2050, as is already adopted by several countries and Australian States. There's also the small matter of whether we are talking net or gross emissions.
Denier (or "skeptic") arguments are increasingly of this form, ignoring the substance of 30 odd years of research and legitimate debate.
Scientists around the world are talking of this Australian summer as a preview of what the world (many countries in temperate latitudes) can expect if the world reaches +3 degrees C heating, which is expected over the next ten years. Note that they are NOT saying that this is where we are now, just that Australia has experienced a combination of global heating of around 1.5C AND a conjunction of particular shorter-term regional heating events. This, on top of successive warm, dry years, is what has given these unprecedented conditions. Preventing global-level warming to +3C is what we are talking about. Reversing the heating that has already occurred is a much longer-term task that most scientists think is well beyond our current technologies.
