Scientists say that there has been a mysterious decline in the growth of methane in the atmosphere in the last decades of the 20th century.
Researchers writing in the journal Nature have come up with two widely differing theories as to the cause.
One suggests the decline was caused by greater commercial use of natural gas, the other that increased use in Asia of artificial fertiliser was responsible.
Both studies agree that human activities are the key element.
See full Article.
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