JoNova

A science presenter, writer, speaker & former TV host; author of The Skeptic's Handbook (over 200,000 copies distributed & available in 15 languages).

The Skeptics Handbook

The Skeptics Handbook II

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GoldNerds

The nerds have the numbers on precious metals investments in Australia and North America

What’s the harm in acting anyway?

Saving energy or stopping pollution is a good thing. What’s the danger in acting now?

We can save energy and stop real pollution without setting up a whole financial bureaucratic system based on “thin air”. The wholly unnecessary trading system feeds the sharks of finance with more money and power. We waste blood, sweat and tears and encourage cheats. We reward fraud and foster corruption.

When we trade real things, people who cheat get caught easily. They can’t get away with it for long. But in the quasi world of meaningless permits-for-air, the only limit to cheating is “what they can get away with”.

For example: Carbon credits paid to China to build hydro dams end up helping bankers buy yachts, and feed the mafiosi in China. They evict homeowners, don’t pay them enough compensation, flood their valleys and commit these people to homelessness or more slavery to bankers through mortgages.

Sure, some useful outcomes might occur. But hoping we get lucky is not “planning”. It’s policy-by-accident. If solar energy, say, is a good idea all on its own, we don’t need to invent fake reasons to force people to use more of it.

We could for example tax [...]

October 29th, 2010 | Tags: , , , , , | Category: AGW socio-political, Global Warming | Print This Post Print This Post | Email This Post Email This Post | Comments (332)

Help! How do I know?

How do you tell a scientist from a non-scientist? Where does science end, and propaganda, politics, and opinion begin? You only need to know one thing:

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Straight away, this sorts the wheat from the weeds. We don’t learn about the natural world by calling people names or hiding data. We don’t learn by chucking out measurements in favor of opinions. We don’t learn by suppressing discussions, or setting up fake rules about which bits of paper count or which people have a licence to speak.

A transparent, competitive system where all views are welcome is the fastest way to advance humanity. The Royal Society is the oldest scientific association in the world. Its motto is essentially, Take No One’s Word For It. In other words, assume nothing; look at the data. When results come in that don’t fit the theory, a scientist chucks out his theory. A non-scientist has “faith”, he “believes” or assumes his theory is right, and tries to make the measurements fit. When measurements disagree, he ignores the awkward news, and “corrects”, or statistically alters, the data–always in the direction that keeps his theory alive.

March 9th, 2010 | Tags: , , , | Category: AGW socio-political, Global Warming, Logic & Reason, The Skeptics Handbook | Print This Post Print This Post | Email This Post Email This Post | Comments (259)

If carbon didn’t warm us, what did?

Svensmarks Cosmic Ray Theory. TOP: If the sun's magnetic field is weak it allows more cosmic rays, which may seed more clouds on Earth. BOTTOM: A strong solar magnetic field blocks the same rays and could mean less clouds and clearer skies.

People have known for 200 years that there’s some link between sunspots and our climate.  In 1800, the astronomer William Herschel didn’t need a climate model, he didn’t even have a calculator — yet he could see that wheat prices rose and fell in time with the sunspot cycle. Since then, people have noticed that rainfall patterns are also linked to sunspots.

Sunspots themselves don’t make much difference to us, but they are a sign of how weak or strong the sun’s magnetic field is. This massive solar magnetic field reaches out around the Earth, and it shields us from cosmic rays. Dr Henrik Svensmark has suggested that if more cosmic rays reach further down into our atmosphere, they might ionize molecules and help “seed” more clouds. As it happens, this year, the sun has almost no sunspots, but for much of the late 20th Century, the solar magnetic field was extremely active. If the theory is [...]

February 26th, 2010 | Tags: , , , , , , | Category: AGW socio-political, Global Warming | Print This Post Print This Post | Email This Post Email This Post | Comments (190)