Meanwhile, an SUV, driven a modest 10,000 kilometres a year, uses 55.1 gigajoules, which includes the energy required both to fuel and to build it.
The Vales used a 4.6-litre Toyota Land Cruiser in their comparison.
One hectare of land can produce approximately 135 gigajoules of energy per year, so the Land Cruiser's eco-footprint is about 0.41 hectares - less than half that of a medium-sized dog.
Doing similar calculations for a variety of pets and their foods, the Vales found that cats have an eco-footprint of about 0.15 hectares (slightly less than a Volkswagen Golf), hamsters come in at 0.014 hectares apiece and canaries half that.
Even a goldfish requires 0.00034 hectares (3.4 square metres) of land to sustain it, giving it an ecological fin-print equal to two cellphones.
The Vales suggest that eco-friendly animal lovers should change the diet of their pet. Meat is the key, since its production is so energy-intensive.
They can almost halve the eco-pawprint of their dogs, simply by feeding it many of the same sort of savory foods that they eat, which are likely to be far less protein-rich than most dog foods, they added.
Source-ANI
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