9 - Entona maitso hafa

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The other GHGs described here are methane and nitrous oxide. In fact, there are a few others such as HFCs (refrigerants). Methane is released as soon as there is anaerobic decomposition (i.e. in the absence of oxygen): in a cow’s belly, also known as the rumen, which gives its name to ruminants (in the rumen, bacteria digest the cellulose that the cow cannot metabolise, then the cow regurgitates this grass to chew it again and swallow it for good); in rice fields because they are covered with water, and the organic matter underwater does not receive oxygen when it decomposes; in waste dumps, when the piles are too deep for oxygen to reach the bottom of the pile. Methane is also the main component of natural gas. Leaks on gas pipelines therefore also release methane into the atmosphere. Emissions of nitrous oxide (N2O) are mainly due to the use of agricultural nitrogen fertilizers, the production of animal feed and certain chemical processes, such as the production of nitric acid. There are also fluorinated gases which are used as refrigerants (air conditioning and cold chains), fire extinguishers and in certain industrial processes and consumer goods (such as certain solvents). They are not naturally present in the atmosphere.

3
Causes

Entona maitso hafa


Entona maitso hafa


Fambolena sy fiompiana

Entona maitso hafa

The pictures in the background of card 9 should put you on the track!


1
Consequence

Entona maitso hafa

the "G" and the "H" on card 9 relate to "GreenHouse" on card 13.


1
Other possible cause

Entona maitso hafa

In fact, methane emissions from industry are as strong as emissions from agriculture because of fugitive emissions (natural gas leaks from pipelines). This is a point that is little known, so this relationship is not considered strongly relevant. Industry also emits HFCs (refrigerants).