Havas has established a global climate change PR team under Peter Bowyer, former spokesman for former UN chief Kofi Annan.
He handed climate justice issues for Annan during the ramp up of the Copenhagen Climate Change Conference in 2009.
Bowyer said change issues are top concerns for current UN boss Ban Ki-moon, who is gearing up for a climate conference in Paris next year, and representatives of the IMF and World Bank.
The new group has hubs in New York, Australia and London, where Bowyer is based, and staffers in more than a dozen countries.
Havas has experience in the climate arena earned from handling Annan's "Tck Tck Tck" Time for Climate Change Justice program, unveiling Dara International's Climate Vulnerability Monitor and launching WWF's Earth Hour global event.
Marian Salzman, CEO of Havas PR North America and noted trend-spotter, expects climate will trend during the next year.