Watch movies on television or streaming spends a lot less energy than DVD

Watch a movie or any other programming via television or streaming can avoid the emission of millions of tonnes of CO2, according to a study published in Environmental Research Letters. At issue is the business of purchase and rent a DVD, which require much more energy.

The problem is not the DVD itself, but rather in laptops and tablets, which are much more efficient in terms of power the DVD players, large consumers of energy. And there's more: rent or buy DVD requires the movement of vehicles, which helps to consume more energy and consume more carbon.

The study was carried out by researchers from Lawrence Livermore National Laboratory and Northwestern University and found that if all who watch the DVD in the United States had changed to streaming services in 2011, about two billion pounds of CO2 emissions have been avoided â€" at the same time, would have been saved 30 petajoules of energy, enough in electricity to feed 200 mi homes.

The researchers calculated that an hour of streaming requires 7.9 megjoules of energy, compared with 13 megajoules on DVD â€" and that their issue is 0.4 kilos of CO2, compared to 0.71 in DVD.

Americans watch too many movies and series, even those already finished for some time now. And although the DVD already being almost a historical object, the truth is that Americans watched 17.2 billion hours of content on DVD and 3.2 billion hours of streaming.

Streaming movies must be housed in banks of servers that consume a lot of energy. Still, they account for less than 1% of the energy used to consume the streaming from home, informs the Smithsonian Magazine.

Foto:  Henrik Moltke / Creative Commons

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