COP15 is name given to the 15th United Nations Climate Change Conference and is seen as the critical venue for forging a global deal to reduce carbon emissions.

A Google Map embedded into the tool lets users zoom in and out to view the number of votes by country, state, city and even postcode. A "learn" tab includes the company's visualisations, using Google Earth, of the potential impacts of climate change.

"There is no silver bullet to solve climate change. However, we might have found the 'bullet' for consolidating all Copenhagen campaigns and to visualise the world's voices on a single platform with Justin's Show Your Vote project," said Alexander Saier, climate change secretariat at the UN.

Baird, who travelled to Germany to present Show Your Vote to the UNFCCC, says that, by the end of the week, he hopes the number of votes collected by his tool will be enough to convince world leaders that a binding agreement to combat climate change is necessary.

"With the COP15 the issue for me was, well, what we really need to do is show the largest public support possible to world leaders," he said in a phone interview.