The argument is fairly simple: By polluting the atmosphere and contributing to climate change carbon emissions impose a cost on society.

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One key element in searching for life on Mars is the presence of methane in the Martian atmosphere As a simple carbon compound, methane is often a precursor to the formation of the complex organic chemicals that make life possible.

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However, the atmosphere quickly turned to gloom when Blackburn went in front after 12 minutes with a slick and simple counter-attack.

BBC: West Ham 1-1 Blackburn