To be "Paris-aligned" means following the goals of an agreement made by many countries in 2015, called the Paris Agreement. The Paris Agreement is a legally binding international treaty on climate change.
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The Paris Agreement aims to keep the earth's temperature from rising too much, by limiting the increase in global average temperature to below 2 degrees Celsius (or even better, 1.5 degrees Celsius), compared to before people started using a lot of machines and factories (called "pre-industrial levels"). The Paris Agreement is a landmark as it brings all nations together to combat climate change as a collective.