a18c0902__Company_Announcement___FT_com__Factor
[Nature] Rio Tinto's operations are energy-intensive and depend on fossil fuels. Worldwide, there is increasing regulation of greenhouse gas emissions, tighter emission reduction targets and progressive introduction of carbon pricing mechanisms. These are likely to raise significantly worldwide energy, production and transport costs over the medium to long term, which will increase the Group's cost base and potentially negatively impact the Group's profitability. [Factor] 
Increased regulation of greenhouse gas emissions could adversely affect the Group's cost of operations
Annual Financial Report – Company Announcement - FT.com
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