I found two stories from New Scientist.
The first some of us have already thought of .
What is your dinner doing to the climate?
It may surprise you to learn that our diets account for up to twice as many greenhouse emissions as driving. One recent study suggested that the average US household's annual carbon food-print is 8.1 tonnes of "equivalent CO2 emissions" or CO2eq (a measure that incorporates any other greenhouse gases produced alongside the CO2). That's almost twice the 4.4 tonnes of CO2eq emitted by driving a 25-mile-per-US gallon (9 litres per 100 kilometres) vehicle 19,000 km - a typical year's mileage in the US.
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The other has a interesting twist.
A high-albedo diet will chill the planet
Researchers are proposing that one way of temporarily reducing global temperatures would be to replace existing crops with variant strains that reflect more solar energy back out to space. The overall effect would be the same as making large areas of the planet more mirror-like. Their calculations suggest this could cause average summer temperatures in temperate zones to fall by as much as 1°C.
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Certainly both are food for thought. ;)