In addition to the numerical score given to each company, the Climate Counts scorecard also gives companies a green, yellow or red light rating.

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All three of these companies earned a green light rating.

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The chancellor's speech comes as Standard and Poor's said it would hold the UK's credit rating at the highest possible level in light of its "wealthy and diversified economy" and said the outlook remained "stable".

BBC: Tory conference: Osborne rules out temporary tax cuts