Climate Change
If the SBTi required its sigantory companies to just sign up to the 'most accessible' (read: lamest) 20% tier in the VCMI Claims Code Of Conduct, demand would increase to 6.2 billion tonnes a year, which in turn would need to be met by high integrity credits under the The Integrity Council for the Voluntary Carbon Market (ICVCM). That's 6.2 billion tonnes of new, additional impact, every single year, reducing annually by the amount of inside value chain outcomes. That demand would take time to meet, but if the signal is there, the capital markets will respond and will deliver the climate finance needed to actually solve this thing.
SBTi figures excludes oil and gas. So, if you are a company planning to offset your emissions (thank you BTW), I wouldn't wait too much longer to start buying.