What about the world's increasing population?
Human-induced climate change is happening. And the UN estimates the world has added approximately one billion humans since 2005.
But depending on where in the world you live - and your lifestyle - a person's emissions can be very different.
Generally, people living in countries like the UK depend heavily on fossil fuels.
According to one study, having one fewer child is the single most effective thing you can do to reduce your emissions.
But this result is contentious and leads to many philosophical and ethical questions which we're not going to wade into here.
Like, if you are responsible for your children's emissions, are your parents responsible for yours?
What are governments doing on climate change?
Individual governments are choosing to tackle climate change in various ways.
But the one thing that has pulled the world together is the Paris agreement.
The deal has united nearly 200 countries in a single agreement on tackling climate change for the first time ever.
Nations pledged to keep global temperatures "well below" 2.0C (3.6F) above pre-industrial times and "endeavour to limit" them even more, to 1.5C.
However, scientists point out that the agreement must be stepped up if it is to have any chance of curbing dangerous climate change.
How much hotter has the world got - and how hot will it get?
Global temperatures rises are generally compared to "pre-industrial times". Many researchers define that as 1850-1900 - before the world was chugging out greenhouse gases on a global scale.
The world is now about 1C warmer than it was back then, according to the IPCC.
For decades, researchers argued the global temperature rise must be kept below 2C by the end of this century to avoid the worst impacts.
But scientists now argue that keeping below 1.5C is a far safer limit for the world.
What does 1.5C mean in a warming world?
It's hard to know much hotter the world will get. But if current trends continue, the World Meteorological Organization says temperatures may rise by 3-5C by 2100.
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