Consumers have huge environmental impact

http://www.eurekalert.org/pub_releases/2016-02/nuos-chh022416.php

Public Release: 24-Feb-2016
Consumers have huge environmental impact
We like to blame the government or industries for the Earth's problems, but what we buy makes a big difference
Norwegian University of Science and Technology

The world's workshop -- China -- surpassed the United States as the largest emitter of greenhouse gases on Earth in 2007. But if you consider that nearly all of the products that China produces, from iPhones to tee-shirts, are exported to the rest of the world, the picture looks very different.

"If you look at China's per capita consumption-based (environmental) footprint, it is small," says Diana Ivanova, a PhD candidate at Norwegian University of Science and Technology's Industrial Ecology Programme. "They produce a lot of products but they export them. It's different if you put the responsibility for those impacts on the consumer, as opposed to the producer."

That's exactly what Ivanova and her colleagues did when they looked at the environmental impact from a consumer perspective in 43 different countries and 5 rest-of-the-world regions. Their analysis, recently published in the Journal of Industrial Ecology, showed that consumers are responsible for more than 60 per cent of the globe's greenhouse gas emissions, and up to 80 per cent of the world's water use.

"We all like to put the blame on someone else, the government, or businesses," Ivanova says. "But between 60-80 per cent of the impacts on the planet come from household consumption. If we change our consumption habits, this would have a drastic effect on our environmental footprint as well."

The analysis allowed Ivanova and her colleagues to see that consumers are directly responsible for 20 per cent of all carbon impacts, which result from when people drive their cars and heat their homes.

But even more surprising is that four-fifths of the impacts that can be attributed to consumers are not direct impacts, like the fuel we burn when we drive our cars, but are what are called secondary impacts, or the environmental effects from actually producing the goods and products that we buy.

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The United States is the overall worst performer when it comes to per capita greenhouse gas emissions, with a per capita carbon footprint of 18.6 tonnes CO2 equivalent, the unit used by researchers to express the sum of the impacts of different greenhouse gases, such as carbon dioxide, methane, nitrous oxide and sulphur hexafluoride.

The US was followed closely by Luxembourg, with 18.5 tonnes CO2 equivalent, and Australia, with 17.7 tonnes CO2 equivalent. For comparison, China's per capita carbon footprint was just 1.8 tonnes CO2 equivalent. Norway, at 10.3 tonnes CO2 equivalent per capita, was three times the global average of 3.4 tonnes CO2 equivalent per capita.

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In the meantime, two easy ways to cut your environmental impact are to stop eating meat, and cut back on your purchases, she said.

Currently, EU consumers spend 13% of their total household budget on manufactured products. If the average EU consumer switches away from spending money on these manufactured products to paying for services instead, this would cut close to 12 per cent of the EU's current household carbon footprint, Ivanova said.

"Any activity where we have a choice of buying a product or using a service, the service will have much less impact," she said.