At about bedtime today, Britain will go into ecological debt – the moment when the country begins living beyond its natural resources and eating into nature’s ‘capital’.

NEW YORK, May 15, 2007 – At the C40 Large Cities Climate Summit here this week, Toronto’s mayor, David Miller, announced that his city would take advantage of a new tool to measure and reduce Toronto’s greenhouse gas emissions.

Miller will team up with Zerofootprint, a nonprofit working to help companies, governments and individuals reduce their carbon footprint, to create Zerofootprint Toronto, the first-ever city-scale project to bring a city’s residents to the table to fight climate change.

While personal carbon calculators are turning into a dime-a-dozen offering across the web, the unveiling of Zerofootprint’s carbon counter at the C40 Climate Summit last week ushers in a new era of a large scale web-based data warehousing that can aggregate carbon emission information from city government, companies, universities, neighborhoods, groups or families.