Weather and climate

Is Trump right that the polar vortex means we need more of that fine fine global warming? Of course not.

The important thing is to look at long-term average temperatures.

The current bone-cracking cold in Chicago is “weather” not “climate”.

The rule of thumb is that weather is what is happening outside your house now; climate is what happens over many years.

So, it can be very cold where you live but the world as a whole could still be getting warmer.

And be in no doubt, says Tim Woolings, the world is continuing to warm.

As Chicago freezes, wildfires are raging in Australia which is in the grip of yet another blistering summer.

And last summer wildfires raged in California.

The 20 warmest years on record have all been in the past 22 years, with 2015 to 2018 making up the top four, according to the World Meteorological Organization.

That’s climate.

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