There are only about 1.6 billion cars in the world. Only about 20% of the world population has access to a personal car. Less than that have ever ridden a plane, and less than 10% fly with any regularity.
A super majority of greenhouse gases emitted are due to the lives of the top 20-30% of the population (of which unfortunately I am a part). The remaining people's contributions are small. 80:20 rule in full glory.
Worst of all, the 80% are the most impacted by climate change as TFA illustrates.
The biggest hope at this point honestly is that fewer people are having kids and we're on track to halve the world population in another couple generations. Greenhouse emissions cut by half.