Visa and MasterCard have about 65 million customers
Cards are made of several layers of plastic laminated together. The core is commonly made from a plastic resin known as polyvinyl chloride acetate (PVCA). This resin is mixed with opacifying materials, dyes, and plasticizers to give it the proper appearance and consistency. - Source : http://www.madehow.com/Volume-4/Credit-Card.html
The average American has 2 to 3 credit cards and there were 304 million Visa credit cards in circulation in the United States and 545 million Visa credit cards in circulation outside of the United States in September 2014. Source : https://www.creditcards.com/credit-card-news/market-share-statistics.php
There are about 189 million Americans adults with at least one credit card.
In Q4 <2014> cards in circulation looked like this :
Citigroup - 109,774,131
JPMorgan - 93,847,656
Bank of America - 79,822,686
Capital One - 63,194,228
American Express - 54,900,000
Discover - 43,630,772
Synchrony - 31,030,786
Wells Fargo - 24,271,107
Barclays Delaware Holdings - 16,156,368
U.S. Bancorp - 14,440,681
So, looking at some of the statistics and considering that those cards must be manufactured with the use of electricity and also destroyed and ending up in landfills, then I would say Bitcoin's carbon footprint must be minuscule compared to this industry.
Feel free to add some updated statistics and also a graphical presentation of what those millions of cards would look like, if you had them all together. We would circle the earth a couple of times, if we had all the cards that were manufactured, since it was introduced many years ago.
Exactly! People are always quick to make and analyze Bitcoin without looking around for other services that are the real consumers of electricity in the world. The mining of Bitcoin uses lesser electricity compared to companies that uses electricity in the production of their major products. Not to talk about credit card and master card companies, recycling companies and oil & gas companies uses a huge amount of electricity in their production compared to bitcoin mining. The electricity used for Bitcoin mining should be least of our concern in terms of electricity usage. These people saying bitcoin is wasting electricity are just haters of it.