Feeding Seaweed To Cows Eliminates Methane Emissions (www.cbc.ca)

Dave Knott writes: A Canadian farmer has "helped lead to a researcher's discovery of an unlikely weapon in the battle against global warming: a seaweed that nearly eliminates the destructive methane content of cow burps and farts," reports the CBC. "Joe Dorgan began feeding his cattle seaweed from nearby beaches more than a decade ago as a way to cut costs... Then researcher Rob Kinley of Dalhousie University caught wind of it." He tested Dorgan's seaweed mix, discovering that it reduced the methane in the cows' burps and farts by about 20 per cent. "Kinley knew he was on to something, so he did further testing with 30 to 40 other seaweeds. That led him to a red seaweed Asparagopsis taxiformis he says reduces methane in cows burps and farts to almost nothing."

"Ruminant animals are responsible for roughly 20% of greenhouse gas emissions globally, so it's not a small number," said Kinley, an agricultural research scientist now working at the Commonwealth Scientific and Industrial Research Organisation in Queensland, Australia. "We're talking numbers equivalent to hundreds of millions of cars."
The researcher predicts a seaweed-based cow feed could be on the market within three to five years, according to the article. "He says the biggest challenge will be growing enough seaweed."

Comments

Re: 20% of GHGs not from ruminant animals really

[slew]

Ask a paleoanthropologist and they will tell you that you are full of shit about the lifespan of early humans.

One issue that may be of interest is fossil records show many examples of humans and neaderthals and analysis shows that many were likely to have died at an older age due the observation of common age related dental issues (such as ground-down and missing teeth) and arthritis. Unfortunately fossil records are rare so it isn't possible to determine the average age related issues, and even if there were many more fossil records, they cannot determine cancers or cardiovascular issues from fossil remains.

As mentioned by other posters, refined sugar and other refined carbs have been identified as a likely candidate (potentially more significant than saturated fats from meat) for many of these diseases, but the jury is current out on that topic.

The reason prehistoric man was attributed with short life-expectancy was because of high infant mortality and childhood deaths (disease and other mortality risks). If we factor those things out, prehistoric man is estimated to have lifetimes similar to those in the 16th century humans. These extrapolations were done by a few decades ago in scientific studies of isolated hunter-gatherer societies in Africa and South America before there was significant contact between these isolated groups and modern society (unfortunately that they are difficult if not impossible to repeat now because of widespread cultural contamination).

You can take these with a few grains of salt, but it tracks with estimates done over historical times (where they have better information) that factoring out infant/child mortality effects, the lifespan of humans has been pretty constant until the industrial revolution when people started living a bit longer. Post-childhood causes of deaths that limit life-expectancy have changed greatly over time. In the hunter-gatherer society external injuries dominated the deaths, in the agricultural society the prevalence of infectious diseases dominated, it wasn't until the industrial revolution that cardiovascular diseases dominated, but as we move to a "high-tech" society cancers now dominate over cardio-vascular disease.

Since our diets have changed since the earlier part of the industrial revolution, I don't think we are eating *less* meat than we were before during the industrial revolution (where we were collectively much poor-er and couldn't afford much meat) so I'm not so sure it is conclusive that meat is the cause of all this cardio-vascular disease during the industrial revolution, and I'm not sure it's a cause of the current cancer epidemic either. Personally, I suspect generally higher calorie diets and less exercise for cardio-vascular disease prevalence and prior-generational under-reporting combined with increased industrial pollution for the modern cancer prevalence. I have no evidence to support this, but I suspect many will agree with that assessment.