JuliaB
08-05-2009, 08:10 AM
SAVE THE PLANET: HAVE FEWER KIDS
LiveScience
August 3, 2009
https://news.yahoo.com/s/livescience/20090803/sc_livescience/savetheplanethavefewerkids
For people who are looking for ways to reduce their "carbon footprint,"
here's one radical idea that could have a big long-term impact, some
scientists say: Have fewer kids.
A study by statisticians at Oregon State University concluded that in the
United States, the carbon legacy and greenhouse gas impact of an extra child is almost 20 times more important than some of the other
environment-friendly practices people might employ during their entire lives-- things like driving a high mileage car, recycling, or using
energy-efficient appliances and light bulbs.
"In discussions about climate change, we tend to focus on the carbon
emissions of an individual over his or her lifetime," said study team member Paul Murtaugh. "Those are important issues and it's essential that they should be considered. But an added challenge facing us is continuing
population growth and increasing global consumption of resources."
Reproductive choices haven't gained as much attention in the consideration
of human impact to the Earth, Murtaugh said. When an individual produces a child -- and that child potentially produces more descendants in the future-- the effect on the environment can be many times the impact produced by a person during their lifetime.
A child's impact
Under current conditions in the United States, for instance, each child
ultimately adds about 9,441 metric tons of carbon dioxide to the carbon
legacy of an average parent -- about 5.7 times the lifetime emissions for
which, on average, a person is responsible.
The impact doesn't only come through increased emissions of carbon dioxide and other greenhouse gases -- larger populations also generate more waste and tax water supplies.
Other offbeat environmental impacts have been in the news recently:
* One 2007 study found that divorce squanders resources, because people who once shared resources such as energy now use twice as much under two roofs.
* The current obesity epidemic may also be hurting the climate, because food production is a major contributor to global warming.
The impact of having children differs between countries. While some
developing nations have much higher populations and rates of population
growth than the United States, their overall impact on the global carbon
equation is often reduced by shorter life spans and less consumption. The
long-term impact of a child born to a family in China is less than one-fifth
the impact of a child born in the United States, the study found.
However, as the developing world increases both its population and
consumption levels, this equation may even out.
"China and India right now are steadily increasing their carbon emissions
and industrial development, and other developing nations may also continue to increase as they seek higher standards of living," Murtaugh said.
Not advocating law
The researchers note that they are not advocating government controls or
intervention on population issues, but say they simply want to make people aware of the environmental consequences of their reproductive choices.
"Many people are unaware of the power of exponential population growth,"
Murtaugh said. "Future growth amplifies the consequences of people's
reproductive choices today, the same way that compound interest amplifies a bank balance."
Murtaugh's findings are detailed in a 2009 issue of the journal Global
Environmental Change.
LiveScience
August 3, 2009
https://news.yahoo.com/s/livescience/20090803/sc_livescience/savetheplanethavefewerkids
For people who are looking for ways to reduce their "carbon footprint,"
here's one radical idea that could have a big long-term impact, some
scientists say: Have fewer kids.
A study by statisticians at Oregon State University concluded that in the
United States, the carbon legacy and greenhouse gas impact of an extra child is almost 20 times more important than some of the other
environment-friendly practices people might employ during their entire lives-- things like driving a high mileage car, recycling, or using
energy-efficient appliances and light bulbs.
"In discussions about climate change, we tend to focus on the carbon
emissions of an individual over his or her lifetime," said study team member Paul Murtaugh. "Those are important issues and it's essential that they should be considered. But an added challenge facing us is continuing
population growth and increasing global consumption of resources."
Reproductive choices haven't gained as much attention in the consideration
of human impact to the Earth, Murtaugh said. When an individual produces a child -- and that child potentially produces more descendants in the future-- the effect on the environment can be many times the impact produced by a person during their lifetime.
A child's impact
Under current conditions in the United States, for instance, each child
ultimately adds about 9,441 metric tons of carbon dioxide to the carbon
legacy of an average parent -- about 5.7 times the lifetime emissions for
which, on average, a person is responsible.
The impact doesn't only come through increased emissions of carbon dioxide and other greenhouse gases -- larger populations also generate more waste and tax water supplies.
Other offbeat environmental impacts have been in the news recently:
* One 2007 study found that divorce squanders resources, because people who once shared resources such as energy now use twice as much under two roofs.
* The current obesity epidemic may also be hurting the climate, because food production is a major contributor to global warming.
The impact of having children differs between countries. While some
developing nations have much higher populations and rates of population
growth than the United States, their overall impact on the global carbon
equation is often reduced by shorter life spans and less consumption. The
long-term impact of a child born to a family in China is less than one-fifth
the impact of a child born in the United States, the study found.
However, as the developing world increases both its population and
consumption levels, this equation may even out.
"China and India right now are steadily increasing their carbon emissions
and industrial development, and other developing nations may also continue to increase as they seek higher standards of living," Murtaugh said.
Not advocating law
The researchers note that they are not advocating government controls or
intervention on population issues, but say they simply want to make people aware of the environmental consequences of their reproductive choices.
"Many people are unaware of the power of exponential population growth,"
Murtaugh said. "Future growth amplifies the consequences of people's
reproductive choices today, the same way that compound interest amplifies a bank balance."
Murtaugh's findings are detailed in a 2009 issue of the journal Global
Environmental Change.