A simple plan: In Thailand, fossil-fueled trucks will transport elephants as part of an effort to convince the US president that carbon dioxide is harmful

Five elephants will trek 250 km in Thailand to urge US President Obama to take action against global warming

The Chang(e) Caravan project is aimed particularly at urging Obama to bring up the issue of a worsening global-warming at the Copenhagen summit [if Obama doesn't bring it up, maybe someone else will?]. "He is expected to take a leadership role over the issue and act on it seriously," Hernandez added.
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There are 15 rest points along the route. All elephants will walk no more than 10 km each day, and will be transported in specially designed trucks in crowded areas or communities, he said.