For a start we should be tackling the problems we create, all the emissions we emit and also the emissions we export with our fossil fuel exports. A good place to begin would be to remove all fossil fuel subsidies immediately.
In fact, the above points to one step on the path to making sure other countries don't offset any efforts we might make (at the moment we make no effort, so irrelevant until we do) is to stop fossil fuel exports. Now I know that the objections will be about employment in the fossil fuel mining industries, but those jobs will be gone soon anyway and the companies currently exporting fossil fuels will be the first to make their workforces redundant while governments wring their hands and claim there is nothing to be done.
What this country should be doing is to exploit the massive advantages we have in renewable energy. Clean hydrogen production, wind power, solar, solar collecting, tidal power, wave power etc. A number of Middle Eastern countries have become rich on the back of fossil fuel reserves. Why we are allowing them to get rich while causing damage to the only planet we have is beyond me when we have such advantages in the energy sources of the future.
The reality is also that a lot of the world (Europe and the USA in particular) are looking at tariffs for countries which do not reduce emissions. We will likely face tariffs unless we get our act together and we should be using tariffs against countries like China, India etc if they don't take action. We actually do have some power in this game because we have the resources they require (for the life of me I don't know why we don't respond to China's restrictions on some of our exports with restrictions on what we export to them - imagine if we told them to shove their restrictions on our wine exports and if they don't - no iron ore). We have vast reserves of lithium which will increase in demand as cars move to electric. Of course, if China do what they are promising, and reduce their emissions to zero by 2060 (I know, we can't trust them, but we can't trust any other country either, no reason why they are being more or less truthful than anyone else) then emissions will fall.
The alternative is to watch as temperatures rise, agricultural regions lose viability, more droughts, more extreme bushfires, more extreme temperatures, sea level rise etc. Experimenting with altering the chemical composition of the atmosphere of the only planet we have is not a good strategy. We are already seeing the impact of climate change with a 1.1C increase in global average temperature, waiting until it gets worse is simply dumb.
DS