Following up on last year's question of "What's the carbon footprint of sending a text message?", The Guardian has now asked "What's the carbon footprint of making a mobile phone call?"
Climate change expert Mike Berners-Lee has considered rather more than the earlier article, factoring in phone manufacture and network administration alongside power consumption. His answer is that a minute's mobile-to-mobile call will generate 57g of carbon.
UK telecoms regulator Ofcom has published its Market Data Update for the last quarter of 2009. It says total revenue fell by 2.1% year-on-year across the UK's four largest mobile operators. However, it notes this was the slowest rate of annual decline during 2009.
Total call volumes across the four network operators increased by 6.3% year-on-year to 27.4 billion in Q4 2009, although roaming call volumes were down by 1.5%. The total number of messages sent reached nearly 26 billion in Q4 2009, equivalent to 367 messages per subscriber; significantly higher than the Q4 2008 figure of nearly 20.5 billion or 299 messages per subscriber.
The Organisation for Economic Co-operation and Development says Finland, the Netherlands and Sweden have the lowest prices for mobile phone calls among its 30 member countries.
The highest mobile call charges were according found in Canada, Spain and the USA.
Dr Mark K Smith from ipadio.com joined us for this week’s podcast.
He talks about the recent launch of ipadio, which can turn a telephone call into a live web broadcast and a phone blog.