I personally think that total emissions is only a viable if you also support population control. But there's always other ideas, like working to make central Australia habitable. Then we could expand our population and stop caring about emissions per capita.
Renewable tech is another thing which I have spent some time looking into and it's always polarising. There's always huge downsides. Like the fact that electric vehicles have very little benefit when powered by a fossil fuel grid. Plus the fact that they use Lithium which is difficult to mine and expensive, not the mention the waste issue due to the batteries having limited life. That goes for residential batteries too. Then there's the long haul issue with no infrastructure in place. And as you said, hydrogen is a long way off, but not so long off for storage and conversion which is what we'll need for future grid storage, but that's another long conversation altogether.
We're a while off getting a real carbon neutral system. But unfortunately coal isn't the future. Renewables are already at the point that they are cheaper than fossil fuel, which means that regardless of how much anyone cares about the environment or climate change, it's the economic damage we should worry about.