With new figures out this month (May 2013) revealing that carbon dioxide levels in the atmosphere have reached an all-time high at 400 parts per million (PPM), the timing for a global competition to find carbon cutting ideas is apt
With new figures out this month (May 2013) revealing that carbon dioxide levels in the atmosphere have reached an all-time high at 400 parts per million (PPM), the timing for a global competition to find carbon cutting ideas is apt
