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This week at Treehugger: An interesting study on the impact of cash incentives on driving habits. A link to a Toyota Yaris review inspired a digression on the influence of automotive writers on the cultural landscape and why that might not be a good thing. Honda has announced that it will start producing solar cells in 2007 and plans to make a refuelling solar-hydrogen station. Finally, the Velomobile, a peculiar vehicle that is half handcrafted kayak and half bicycle.

[Treehugger s Perspective Shift roundup appears every Wednesday]