The global approach is flawed. The Paris agreement, which supposedly got the world united in this fight has no teeth. It's good that it allows for countries to set their targets, but even then, it's not like they face serious consequences if they don't meet those self-appointed goals. And there's always the option of just peacing out from the deal, like trump did.
While he rightfully gets a lot of flack for that, it's notable that other countries (Canada) did exactly that with the Kyoto protocol, not to mention so many countries didn't even make binding agreements or ratify it (US).
What I'm finding laughable is the goals that were set in Paris. Take a look at your country's goal under the Paris agreement, and google your country's current carbon emissions. I bet that the emission levels at the height of COVID measures when travel/work etc were most restrictive, still aren't even close to what your target is. That's right, even if we kept emissions levels at the point they were when everyone was staying at home, that still isn't anywhere close enough to meet those targets. I'm willing to bet that many (probably the majority) of countries are going to be revising their targets or simply just not meet them as the 2030 deadline comes near.