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Surveys by Mental Health America and other researchers have found that people affected by the lousy economy have a higher risk for mental illness, especially such conditions as depression and anxiety.

The Mental Health America survey found that unemployed people were four times as likely as people with jobs to report symptoms consistent with severe mental illness.But the harmful mental effects of the economy aren't limited to the unemployed. People whose jobs were changed by the economic downturn -- those who went through involuntary job changes or had their hours or pay cut at work -- were twice as likely to have symptoms consistent with severe mental illness, the survey found.It also found that unemployed people were four times more likely to think of harming themselves and twice as likely to report substance or alcohol abuse or worries about their mental health.

At a time when they need professional help more than ever, many people have less access to it, the survey also revealed. About half of the survey participants who were unemployed said they had difficulty obtaining health care. Of those who hadn't spoken to a doctor about their mental health concerns, 42% said it was because the care was too expensive or they didn't have insurance to cover it.

Public bicycle sharing schemes such as Barcelona's "Bicing" program or London's "Boris Bikes" save lives and reduce greenhouse gas emissions, according to a study on Friday.

Researchers at the Center for Research in Environmental Epidemiology in Barcelona found in a study, however, that around 9,000 tons of carbon dioxide pollution are averted and some 12 lives saved each year by Barcelona's scheme, which was introduced in March 2007.

From this they estimated the number of deaths associated with traveling by bike compared with driving for three main factors -- physical activity, road traffic incidents and exposure to air pollution. They also estimated the reduction in carbon dioxide emissions.Looking at the Barcelona "Bicing" scheme, they calculated an annual increase of 0.13 deaths from air pollution and 0.03 deaths from traffic accidents among cyclists compared with car users.But as a result of high levels of physical activity, 12.46 deaths were avoided, making a total of 12.28 deaths avoided among cyclists every year, the researchers said. They also estimated a reduction in carbon emissions of over 9 million kg or 9,000 tons per year, the equivalent to flying 1,800 people to Sydney and back from london.The World Health Organization (WHO) recommends adults should do at least 150 minutes of moderate exercise a week and says this could be done by walking for 30 minutes five times per week or by cycling to work every day.