Top 10 Odd Environmental Ideas

Environmental experts recently called toilet paper "one of the greatest excesses of our age," leading to suggestions that Americans adopt reusable cloth toilet wipes as an environmentally friendly alternative. Gross? Maybe, but it's just one of a slew of slightly offbeat ways to save the environment. Here's a look at 10 of the most odd, along with TIME's assessment of just how crazy they are.

— Dan Fletcher

The Tempuramobile

top ten crazy eco ideas tempura powered rally car dakar

The Problem: The usual: cars running on fossil fuels.

The Solution: Japanese researchers developed a race car that runs on cooking oil from tempura — a popular Japanese method of frying fish and vegetables. They entered the car in the famed Paris-to-Dakar rally in 2007 as a way of raising awareness about biofuels, which researches say burns cleaner than fossil fuel and without as many harmful emissions. Tempura oil is particularly well suited to Japan — the food is hugely popular, making the cooking oil readily available.

Eco Craziness 2/5. Entering an experimental car in one of the world's most grueling and dangerous races to prove an environmental point might seem nuts, but driver Ukyo Katayama finished the race 68th out of the field of 109 who finished the arduous course. Many didn't make it the whole way, so perhaps a tempura-powered car is not so crazy after all.

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