Who is the world leader in carbon emissions?

I'm curious to know, who exactly stands at the forefront when it comes to carbon emissions on a global scale? Which nation or entity is contributing the most significantly to the rising levels of greenhouse gases that threaten our planet's climate? Is it a developed country with a heavy industrial base, or perhaps a rapidly growing economy with a significant reliance on fossil fuels? Understanding the identity of this leading emitter is crucial in devising effective strategies to mitigate the impacts of climate change.