Topic 6: Global warming
6.1.1 - Describe the role of greenhouse gases in maintaining mean global temperature.
The greenhouse effect is a normal and necessary condition for life on Earth. Consider carbon dioxide (CO2) levels in geological times.
6.1.2 - Describe how human activities add to greenhouse gases.
Water, CO2, methane and chlorofluorocarbons (CFCs) are the main greenhouse gases. Human activities are increasing levels of CO2, methane and CFCs in the atmosphere, which may lead to global warming.
6.1.3 - Discuss qualitatively the potential effects of increased mean global temperature.
Consider the potential effects on the distribution of biomes, global agriculture and human societies. Students should appreciate that effects might be adverse or beneficial, for example:
• biomes shifting
• change in location of crop growing areas
• changed weather patterns
• coastal inundation (due to thermal expansion of the oceans and melting of the polar ice caps)
• human health (spread of tropical diseases).
• biomes shifting
• change in location of crop growing areas
• changed weather patterns
• coastal inundation (due to thermal expansion of the oceans and melting of the polar ice caps)
• human health (spread of tropical diseases).
6.1.4 - Discuss the feedback mechanisms that would be associated with an increase in mean global temperature.
6.1.5 - Describe and evaluate pollution management strategies to address the issue of global warming.
6.1.6 - Outline the arguments surrounding global warming.
Human impact, concept of global dimming due to increased levels of atmospheric pollution.
6.1.7 - Evaluate contrasting human perceptions of the issue of global warming.
According to studies, the increase in water vapor, increase CO2 emissions. These emissions cause greenhouse gases, and this are caused by humans, and translates to the global warming issue that we’re facing. According to the United Nations, we are at the end of our times, since we, humans, are accelerating the process of global warming.
For example: (ice melt, Gree)
For example: (ice melt, Gree)