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… Chlorine that reaches the stratosphere is also produced by natural occurrences such as volcanic eruptions or large … of chlorine fluctuate. It has been shown, however, that natural sources only create approximately 15% of chlorine in … Protocol has also avoided the emissions of greenhouse gas equivalent to more than 135 billion tonnes of carbon …

… and nutrition and encourage more sustainable management of natural resources. The research is carried out by the 15 … Tunisia, focusing on concerted, sustainable management of natural resources in arid, semi-arid and dry sub-humid areas … nutrient cycling: soil organic carbon dynamics, greenhouse gas emission and feedback mechanisms, Impact on the …