http://viewer.zmags.co.uk/publication/47d7b32c#/47d7b32c/93
Prior to the first Green Revolution, which
began modernising agriculture six decades
ago, food production was close to carbon
neutral because it was based on recycling of
agricultural waste and the use of solar energy for
nitrogen sequestering. Today, food production in
many developed countries consumes more fossil fuels
than all other sectors except for transportation. In
fact, the food production industry as a whole is the
leading single contributor to greenhouse gases. The
development of approaches to reduce our carbon
footprint should thus include strategies to alter the
ways we produce food to accommodate the growing
global population.
Thanks to the Green Revolution and the growth of the
industrial and service sectors, families in wealthier
countries spend a smaller proportion of their household
income on food than they did before 1945. The caloric
output of the world agricultural sector is way up. Modern
agricultural productivity is feeding a rapidly growing global
population. On its face, this looks like quite an
accomplishment.
Modern agriculture does produce a lot of food calories.
Indeed, in many sectors, it overproduces. Whether this
overproduction is a net good, however, depends on what is
being measured.
For example, at the same time that it feeds more people
more cheaply, overproduction contributes to poor health and
rising health care costs. It also harms smaller farmers
throughout the world, who are unable to complete with
highly subsidised, high output agricultural products,
particularly wheat, corn, and soybeans. In less developed
countries, these highly subsidised products enter the market
as foreign aid, notwithstanding their negative impact.
Finally, nutrient levels as measured per weight unit today
have been falling ever since we adopted, and subsidised, a
high output agricultural policy. The latest, peer reviewed
studies conclude that, except for carbohydrates, our food
(primarily fruits and vegetables) contains significantly less
nutrients than it did prior to modern agriculture, 25 per
cent less on average.1
CALORIES ARE UP AND NUTRIENTS ARE DOWN
As we grapple with the sustainability of agriculture to feed
10 billion people by 2050, and given all what we have
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