The biggest rise in emissions is coming from motor vehicles. It's those areas that are very difficult to get at because of the fragmentation. Of course because they are individuals and because you can't tell people what to do.

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We have got to keep the action going. We can't afford to put things aside for some years and start again later. We have to keep momentum. But we are heading in the right direction and the Hague conference may take us one important step further.

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