Showing posts with label methane. Show all posts
Showing posts with label methane. Show all posts

Saturday, 29 October 2016

The Battle for our Grasslands and Livestock

By Viv Forbes

Grasslands and arable land cover just 10% of Earth’s surface but (with the oceans) they produce all of our food and fibre. But the productivity and health of our grasslands, farms and livestock are under threat from disproportionate global warming alarmism and immoderate green preservationists.

We are afflicted by methane madness. It is poor public policy that condones restrictions on grazing operations, or taxes on grazing animals, based on disputed theories that claim that bodily emissions from farm animals will cause dangerous global warming.
New Zealand was the first country to propose a “livestock fart tax”. Four hundred farmers then drove 20 tractors to the Parliament in Wellington waving placards and banners saying “STOP THE FART TAX”. The proposal was laughed out of Parliament. But the war on farmers and livestock continues
Used by permission. Cartoonist Steve Hunter. www.clexit.net


Ruminants such as sheep, cattle and goats cannot make long-term additions to the gases in the atmosphere - they just recycle atmospheric carbon and nitrogen nutrients in a cycle-of-life that has operated for millennia. Grazing ruminant animals with their emission products have always been part of healthy grasslands.

Many otherwise genuine environmentalists are assisting the destruction of grasslands with their native pastures and endangered grass birds. Blinded by their love for the trees, they neglect the grasses, legumes, herbs and livestock that provide their food. In Australia they pass laws to protect weedy eucalypts invading the grasslands but ignore the valuable and declining Mitchell grass that once dominated Australia’s treeless plains.

Grasslands are also under threat from cultivation for biofuel crops, from subsidised carbon credit forests and from the remorseless encroachment of fire-prone government reserves and pest havens.

We have the modern methane madness. Mobs of grazing ruminants have been roaming the grasslands since cave-man days. Methane has also been seeping from marshes, bubbling out of oceans, leaking from coal seams and oil seeps and being released in huge quantities from volcanoes. So what more can a few domestic cows and sheep do to affect this? Methane from domestic ruminants is a non-problem.

It is a foolish and costly fantasy to believe that Earth’s climate can be controlled by passing laws, imposing taxes, attempting to manipulate the bodily emissions of farm animals or trying to prevent farmers from clearing woody weeds invading their pastures


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The Clexit (ClimateExit) Coalition, comprising over 190 representatives from 26 countries, has formed the Clexit Grassland Protection Group with nine representatives from five big grazing countries.

 

Friday, 10 April 2015

Hydrogen – the Net-Negative Energy Option

Photo sourced [here]

 by Viv Forbes 

The same people who promoted intermittent energy (wind and solar) have trumped that with their latest green energy fad – hydrogen fuel.

Hydrogen is the most abundant element in the universe; it fuels the sun and is the third most common element on Earth. But it is so reactive that it is seldom found in its elemental state - it combines strongly with other elements such as oxygen to form water or with carbon to form methane. It is an essential component in all acids, alkalis, hydro-carbons and organic materials.


To extract hydrogen from natural compounds such as water, methane or coal requires very large inputs of energy. Most commonly hydrogen is produced from methane gas using heat and steam, or by electrolysis of water using large quantities of electricity.

Hydrogen can be used to power rockets, cars and engines of all types. However the energy used to produce the hydrogen can never be fully recovered from the energy in the hydrogen. It is thus NOT a source of energy – it is merely a storehouse for energy - a battery.

It is possible to produce hydrogen from water using electricity from nuclear or hydro-carbon fuels, or even intermittent green energy. The hydrogen gas could then be transported to cities as a clean energy source for cars, thus reducing pollution from petrol/diesel vehicles.

But hydrogen is a very dangerous gas. It has tiny lightweight molecules which have low energy density and are difficult to compress, contain and store. It also forms an explosive mixture with air. To provide a network of hydrogen car-fuelling stations, or to suggest hydrogen as a domestic gas, is inviting explosive disasters in the suburbs – (imagine the Health and Safety regulations!)

Inviting explosive disasters in the suburbs?
https://www.youtube.com/watch?feature=player_embedded&v=MMB2VR0087w

Even the impractical electric cars have benefits compared to the hydrogen car. Electricity is safer and the supply network is easier and essentially in place. Moreover, electric cars do not reduce the oxygen content of city air - every tonne of hydrogen fuel consumes eight tonnes of oxygen to produce nine tonnes of water vapour. So instead of urban smog, we may get urban fog.

And to suggest that hydrogen can provide base-load power tops all green energy idiocy.

Hydrogen is a Net-Negative Energy Option.

Viv Forbes,
Rosewood    Qld   Australia
forbes@carbon-sense.com

Photo sourced Wikipedia