COP26 begins: guide to understand it | CNN

All the details of COP26, which begins this Sunday in Scotland.

The United States and China are the largest emitters of greenhouse gases.

But who is worse?

Put your climate knowledge to the test.

Discover the terms with which the climate is discussed.

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COP26: everything you need to know

All eyes are on Glasgow, Scotland, where COP26 officially begins this Sunday, the UN summit on climate change that comes at a key moment: scientists have warned that the window to limit the increase in global temperatures and avoid the worst consequences of this crisis is closing.

What are the objectives of COP26?

In what state are the commitments for the reduction of greenhouse gases?

Here, everything you need to know about the conference that is expected to be 25,000 people.

• From "net zero" to "mitigation", these are the terms with which climate is discussed

• OPINION |

  Climate parachutes at COP26

• Can carbon offsetting prevent a climate disaster?

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The US and China are the largest emitters of greenhouse gases.

But who is worse?

China and the United States are the two largest emitters of greenhouse gases in the world, so any attempt to tackle the climate crisis will have to involve large cuts in emissions from these two nations.

China's emissions are more than double that of the United States, but historically, the United States has emitted more than any other country in the world.

There are many factors to consider when judging a country's climate credentials.

Here's how the two compare.

China, the country that pollutes the most, disappoints again 0:53

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What will happen if the increase in global temperature is not limited?

This says science

In August, the United Nations Intergovernmental Panel on Climate Change, which brings together experts from around the world, released a report that represents the most comprehensive and conclusive "state of the science" on the climate crisis: why it happens, how it affects to all regions of the planet, how bad things are and what must be done to avoid the worst consequences.

5 keys to the climate crisis in the UN report 1:40

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Country commitments are not enough.

These are the numbers

Almost 200 countries have committed to reducing greenhouse gas emissions to avoid the worst consequences of the climate crisis.

However, there is still a huge gap between what has been promised and what scientists say is needed, according to a report from the United Nations Environment Program.

G20 countries' CO2 emissions grow 0:49

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Test your knowledge about climate change with this quiz

You know that the planet is moving on a "catastrophic" trajectory as a result of climate change.

You no longer have any doubts that this climate crisis is the product of human action.

And you are aware that this 2021 gave us very clear samples of how our future could be seen in the form of droughts, heat waves, fires and historical floods.

But how much do you really know about climate change?

Answer these questions and find out.

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Volcanoes vs.

Humans: What Affects Climate Change Most?

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The number of the day

 149% 

Despite the paralysis of economic activity due to the pandemic, the concentration of carbon dioxide in 2020 was 149% higher than pre-industrial levels, reaching another annual record, according to the World Meteorological Organization.

It is the highest level in the last 3 million years.

China: CO2 emissions at record highs 0:32

Quote of the day

"If we can all take a leap of faith and begin to perceive that every current and future inhabitant of this fragile planet is as amazingly human as we are, then we may have a chance to avoid more climate disasters."

Keith Magee, a theologian, political adviser, and social justice scholar, says it's not just carbon emissions - human failures are also ruining the climate.

Climate activists go on hunger strike in Washington 1:36

And to finish...

"At least we had an asteroid. What's your excuse?": A dinosaur "breaks" into the UN to deliver this message to leaders

"Extinction is not a good thing. And cause your own extinction? In 70 million years, it is the most ridiculous thing I have heard!"

This is part of the message of Frankie, the dinosaur who stars in the new campaign of the United Nations Development Program that warns about millionaire subsidies for fossil fuels that put the planet in check.