Cost of survival

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The discovery that climate change may have led to the collapse of civilisations more than 3,000 years ago (“New clues to why flourishing Bronze Age cultures collapsed”, 15 August) is a timely warning that the same could happen to our modern, technological civilisation. It will not survive in a global greenhouse causing inter alia a huge rise in sea level, drowning all the major coastal cities.

Attempts to reduce greenhouse gas emissions are failing, leaving only one technological option: reducing solar heating by geo-engineering. It will be costly, but what price do we put on our survival?

Steuart Campbell

Dovecot Loan

Edinburgh

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