A new study carried out by Norwegian researchers at the Center for International Climate and Environmental Research (CICERO) of Oslo Univerity reveals that road traffic is the worst offender. It causes more greenhouse gas emissions than aviation, which is the second-largest pollutor. By contrast, shipping has a cooling effect.Aviation is second in the research because the researchers opted for a historical approach. The historical contribution from aviation emissions to global warming is more than doubled by the contribution from road emissions. “Over the next 100 years, today’s road emissions will have a climate effect that is four times higher than the climate effect from today’s aviation emissions”, the researchers say.Source: globalpolitican.com; find full article here.