Green is the new black, or so it seems, based on the growing number of companies that are making ​“green” claims. Claims about carbon reductions are particularly in fashion, both with advertisers and with a growing number of challengers who are questioning the basis for those claims. Some lawsuits even allege that there are ​“foundational issues with the voluntary carbon offset (“VCO”) market” – the principle means for substantiating those claims – that render ​“claims based on offsets inherently problematic.”