But even non-scientists are starting to recognise that some of these assertions are meaningless. Climate change has been "real" on Earth and other planets for billions of years, for example.

So has sunrise and gravity, but that doesn't mean humans are causing them. And carbon dioxide, the "infrared absorbing gas" blamed by climate campaigners for most of the past century's modest warming, is no more a pollutant than is the major "greenhouse gas" in the atmosphere, water vapour.

Even the terms "greenhouse gases" and the "greenhouse effect" are misnomers since the Earth's atmosphere behaves very differently to a greenhouse. Greenhouses use a solid barrier (the glass roof) to prevent heat loss by convection yet, lacking such a barrier, convection accounts for about half of the heat loss from the surface of the Earth.

Even as the impact of these phrases gradually dwindles among educated people, other equally misleading phraseology is coming to dominate the debate. One in particular has become so entrenched that even those who oppose fashionable thinking on climate change use it unthinkingly.

We are told we must "reduce carbon" or "carbon emissions". To do this, we need to engage in "carbon trading" and "carbon capture and storage" and even build up "carbon credits" to offset our "carbon liabilities".

What on Earth is all that about? "Carbon" is a solid, naturally occurring, non-toxic element found in all living things. Carbon forms thousands of compounds, much more than any other element. Everything from medicines to trees to oil to our own bodies and those of all other creatures are made of carbon compounds.

But pure carbon occurs in nature mainly in only two forms: graphite and diamonds. So, are we supposed to trade in our high-graphite pencils for lower-graphite ones? Or return our diamond jewellery? Perhaps we are speaking about soot emissions reduction since so-called "amorphous carbon" (that is, carbon without structure) is the main ingredient in soot and that is certainly a pollutant important to reduce.

Of course what is really being addressed is one specific compound of carbon, namely carbon dioxide (CO2). It really should be "CO2 emissions", "CO2 capture and storage" (something that has yet to be demonstrated on a large scale and poses significant risks), "CO2 emissions trading", etc.

Ignoring the oxygen atoms and calling CO2 merely "carbon" makes about as much sense as ignoring the oxygen in water (H2O) and calling it "hydrogen". That might be an effective PR tool for anti-hydro power campaigners but most of the public would regard such a leap as ridiculous.

The "CO2 is carbon" mistake is no less farcical. Throwing a high-graphite pencil into the air could be considered as more a "carbon emission" than is the CO2 from coal stations.

This is part of the way in which language has been distorted to bolster concerns about human-caused climate change.

Calling the gas "carbon" encourages people to think of the gas as "pollution" or something "dirty", like graphite or soot.

Calling CO2 by its right name would help people remember that, regardless of whether its rise is causing climate problems (a point of strong debate among climate scientists), it is really an invisible gas essential to plant photosynthesis and so all life.  Source

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