Anderer Ressourcentyp

Siemens Stiftung

Consequences of slash-and-burn

Interactive schematic diagram:
The slash-and-burn method of clearing tropical rainforests contributes to global warming.

The graphic shows the relationship between slash-and-burn clearing of tropical rainforests and global warming: Forest area is decreasing as a result of slash-and-burn, and less carbon dioxide is being absorbed from the air. In addition, combustion gases are increasing the amount of carbon dioxide in the atmosphere. The carbon dioxide absorbs the heat radiated from Earth into outer space. This facilitates the greenhouse effect, increasing the temperature on Earth.

Information and ideas:
The UN Intergovernmental Panel on Climate Change (IPCC) assumes that slash-and-burn clearing of tropical rainforests contributes between 10 percent and 20 percent to the global greenhouse effect.


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Anderer Ressourcentyp, Arbeitsblatt

Siemens Stiftung

The rainforest role-playing game: Protect or use?

Teaching ideas:
Instructions for a role-playing game that makes it possible for the students to experience the dangers for tropical rainforests.

The students should grapple with the reasons for rainforest destruction. The teacher first introduces the topic of rainforests in general and the consequences of their destruction. Then the students should discuss the causes of destruction. They can do so by putting on a fictitious talk show on the topic of "Rainforest - protect or use?" or by role-playing a "UN mini-summit." The students appear as representatives with different interests and defend their points of view.
Tips are provided to help the students prepare the content. The game situation is briefly explained. Then the six roles are described in detail:
· Plantation manager
· Fine wood dealer
· Native inhabitant of the rainforest
· Peasant farmer
· Consumer in central Europe/North America
· Conservationist
Background information and links to additional information are provided for working out the roles.
A double teaching period should be provided to prepare for and carry out the role-playing game.

Information and ideas:
Other roles can be added, such as an engineer for road construction.

Using the following sources: Dr. Tom Deutschle; WWF 2011 Living Forest Report; "Indigenous affairs 2/05," IWGIA (2005); "Geografie Infothek," Klett; Pro REGENWALD; Süddeutsche Zeitung (Sept. 2, 2012); Schrot & Korn Magazin (09/2012)


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Bild

Siemens Stiftung

Rainforest destruction - view from outer space

Photos:
Satellite images from NASA show rainforest destruction in South America and in the region of Mato Grosso, Brazil, in 2004 and 2007 respectively.

Left photo: Many gases are produced during slash-and-burn, including great amounts of carbon monoxide (CO). The concentrations of these gases in the air were recorded by a NASA satellite from July 19 to 27, 2004. The red and yellow areas indicate the regions with higher CO concentration in the air. The region of Mato Grosso is outlined (purple line).
Right photo: Road construction smooths the way for slash-and-burn. The NASA satellite image of the region of Mato Grosso, Brazil, taken on August 5, 2007, shows the plumes of smoke associated with slash-and-burn. The sources of fire are marked in red. Their course along a road is clearly visible. The unspoiled areas of the rainforest are green, and the deforested areas are brown.


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Video

Siemens Stiftung

Slash-and-burn in rainforests

Video (01:41 minutes):
How does the large-scale slashing and burning of the rainforest affect the climate?


The video describes how the practice of slash and burn has drastically increased over the past few years to make room for cattle raising and the cultivation of feed and vegetation for biofuels. The consequences for the Earth?s climate are devastating.

This video is an excerpt from the teaching DVD, "Der gefährdete Regenwald - Klima- und Artenschutz".