It costs less than a pound to run an iPad for a year

An iPad uses 5% of the resources of a PC

Jonathan Fahey, for the Associated Press:

That coffee you're drinking while gazing at your iPad? It cost more than all the electricity needed to run those games, emails, videos and news stories for a year.

The annual cost to charge an iPad is just $1.36, according to the Electric Power Research Institute, a non-profit research and development group funded by electric utilities.

By comparison, a 60-watt compact fluorescent bulb costs $1.61, a desktop PC adds up to $28.21 and a refrigerator runs you $65.72.

$1.36 is just 88p. It's actually quite a lot more expensive than that to run an iPad in the UK, though, since electricity here is almost twice as expensive (13.7p as opposed to 7.4p per kilowatt hour). Even so, the key point stands up: the cost of running an iPad for a year is less than 5 per cent of the cost of running a desktop PC for a year.

They may not feel like it yet, but tablets are the future of computing. Just as laptop PCs have eaten away at the market share of desktops, so the same thing will happen with tablets and laptops.

And this, fundamentally, is the flaw in arguments that there must be limits to growth. It's an idea that has celebrated its 40th birthday this year: that economic growth requires continuous consumption of resources, which will eventually overshoot the carrying capacity of the earth. A recent publication by the New Economics Foundation restates it:

[I]ndefinite global economic growth is unsustainable. Just as the laws of thermodynamics constrain the maximum efficiency of a heat engine, economic growth is constrained by the finite nature of our planet’s natural resources (biocapacity). As economist Herman Daly once commented, he would accept the possibility of infinite growth in the economy on the day that one of his economist colleagues could demonstrate that Earth itself could grow at a commensurate rate.

Yet this little bit of news shows that to be false - or at the very least, not as self-evidently true as it seems. No-one can deny that moving from one desktop PC to 20 iPads feels a bit like some growth has happened; and yet it requires fewer, not more, resources.

Good news, everyone! Things might carry on getting better. That would be nice.

Charging for just under two pounds.

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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“I felt very lonely”: addressing the untold story of isolation among young mothers

With one in five young mothers lonely “all the time”, it’s time for employers and services to step up.

“Despite having my child with me all the time, I felt very lonely,” says Laura Davies. A member of an advisory panel for the Young Women’s Trust, she had her son age 20. Now, with a new report suggesting that one in five young mums “feels lonely all the time”, she’s sharing her story.

Polling commissioned by the Young Women’s Trust has highlighted the isolation that young motherhood can bring. Of course, getting out and about the same as you did before is never easy once there’s a young child in the picture. For young mothers, however, the situation can be particularly difficult.

According to the report, over a quarter of young mothers leave the house just once a week or less, with some leaving just once a month.

Aside from all the usual challenges – like wrestling a colicky infant into their jacket, or pumping milk for the trip with one hand while making sure no-one is crawling into anything dangerous with the other – young mothers are more likely to suffer from a lack of support network, or to lack the confidence to approach mother-baby groups and other organisations designed to help. In fact, some 68 per cent of young mothers said they had felt unwelcome in a parent and toddler group.

Davies paints what research suggests is a common picture.

“Motherhood had alienated me from my past. While all my friends were off forging a future for themselves, I was under a mountain of baby clothes trying to navigate my new life. Our schedules were different and it became hard to find the time.”

“No one ever tells you that when you have a child you will feel an overwhelming sense of love that you cannot describe, but also an overwhelming sense of loneliness when you realise that your life won’t be the same again.

More than half of 16 to 24-year-olds surveyed said that they felt lonelier since becoming a mother, with more than two-thirds saying they had fewer friends than before. Yet making new friends can be hard, too, especially given the judgement young mothers can face. In fact, 73 per cent of young mothers polled said they’d experienced rudeness or unpleasant behaviour when out with their children in public.

As Davies puts it, “Trying to find mum friends when your self-confidence is at rock bottom is daunting. I found it easier to reach out for support online than meet people face to face. Knowing they couldn’t judge me on my age gave me comfort.”

While online support can help, however, loneliness can still become a problem without friends to visit or a workplace to go to. Many young mothers said they would be pleased to go back to work – and would prefer to earn money rather than rely on benefits. After all, typing some invoices, or getting back on the tills, doesn’t just mean a paycheck – it’s also a change to speak to someone old enough to understand the words “type”, “invoice” and “till”.

As Young Women’s Trust chief executive Dr Carole Easton explains, “More support is needed for young mothers who want to work. This could include mentoring to help ease women’s move back into education or employment.”

But mothers going back to work don’t only have to grapple with childcare arrangements, time management and their own self-confidence – they also have to negotiate with employers. Although the 2003 Employment Act introduced the right for parents of young children to apply to work flexibly, there is no obligation for their employer to agree. (Even though 83 per cent of women surveyed by the Young Women’s Trust said flexible hours would help them find secure work, 26 per cent said they had had a request turned down.)

Dr Easton concludes: “The report recommends access to affordable childcare, better support for young women at job centres and advertising jobs on a flexible, part-time or job share basis by default.”

Stephanie Boland is digital assistant at the New Statesman. She tweets at @stephanieboland