1. Cross-cutting issue I: Introduction

Introduction to climate change and greenhouse gases emissions

In this lecture, we quickly cover the basics of the greenhouse effect and of climate change. It is an introductory lesson meant to be sure that these notions are correctly understood, as they are important to understand the issues around urban climate policies.

What is climate change, and what are the greenhouse gases?

Presentation

Download the presentation First part and second part.

Video presented in the course

CO2 concentration in the atmosphere during one year.

References cited in the course

Evolution of greenhouse gases emissions

How much time do we have to act?

See also

Another explanation of the carbon budget:

References

The historical evolution of GHG emissions

This is the course as it was presented in 2020. The slides with updated figures can be found here (but the main messages are still valid today).

Until 2020

The impacty of Covid 19 on emissions

References

All the figures are coming from the Global Carbon Project.

Who is responsible for climate change?

Download the presentation

References

The figures are coming from the Global Carbon Project, the report “Chiffres clés du climat, France, Europe et Monde”, and the 2021 report of the French High Panel for Climate Change (Haut Conseil pour le Climat).

Self-assessment quiz

To know your knowledge level on climate change.

It is recommended that you know what to answer to the following questions, to take the most of the next sessions.

Click to unroll the questions

  • Could you explain simply what is the greenhouse effect and what is climate change ?
  • What are the main greenhouse gases, and how are they produced by human activities?
  • Why do we say that red meat consumption is an important cause of greenhouse gases emissions?
  • If we stopped all GHG emissions now, how long would it take for the climate to come back to normal?
  • What is the link between climate change and ozone layer?
  • What is the link between climate change and air pollution?
  • What is the link between climate change and global biodiverse decrease?
  • What will be the main impacts of climate change in a city like Paris?
  • What will be the main impacts of climate change in a city like Madrid?
  • What will be the main impacts of climate change in a city like New York?

To know more

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