Introduction

What is climate change?



D7.1 Humans affect Earth
News feeds and social media are littered with articles, comments, and memes about climate change, but do you really understand what climate change is all about? The consensus among scientists is that Earth is experiencing a global climate change, but there are others who claim that climate change is not real. Who do you believe?

In this lesson, you will learn what climate change is and what causes it. You will examine human activities contributing to climate change. You will also study evidence showing that these human activities affect climate change.

You will look at historical climate changes and investigate how these climate changes differ from the present climate change.

  Targets

By the end of this lesson, you will be able to

  • investigate past changes in Earth’s climate
  • explain the natural and enhanced greenhouse effect and the role of various gases in them
  • examine the evidence that identifies how human actions on biomes have the potential to change global climate

  Watch This

Temperature Anomalies Arranged by Country from 1900 to 2016  Β© YouTube climatecentraldotorg  


Watch this video for a visual of how the global temperature of Earth has increased over the last 116 years. Each bar represents a country, with a blue bars being below the average temperature, the white bars being at average temperature, and the red bars being above average temperature. The deeper the red colour, the higher the temperature. There is also a graph in the upper right-hand corner of the video that shows the average temperature of Earth overall. This video will get you thinking about the evidence that scientists have collected to support the theory of global climate change.