Okay.
Okay, and then let's do the feet.
Is climate change happening?
If it is, why are some world leaders under the delusion
that it is not?
Well, the overwhelming consensus among scientists
is that the climate is indeed changing.
It's absolutely clear that over the last half a century or so,
temperatures have been rising pretty steadily.
And we know what's causing this warming.
Since the advent of the Industrial Revolution,
we've burned fossil fuels for energy,
and that has increased CO2 levels in the atmosphere
and warmed the planet.
It looks as though the average world temperature is not
far short of 1 degree centigrade higher
than it was in pre-industrial times.
Why are some world leaders deluded about this?
Well, in some sense, they're paid to be.
Some world leaders, most importantly,
means Donald Trump.
The US president who, I think, at one point
said climate change is a hoax invented by the Chinese.
That's partly because some of the Republicans would say:
well, yes, the climate is changing,
but that's not man-made.
It's just kind of inevitable.
But there's also a stream of the Republican party
today in America that's saying: actually, the climate probably
is changing, but we don't want to use the word 'climate
change' because we want to make sure that the energy
sector in America and American energy interests
are still protected.
There are very large interests in favour of denying climate
change.
Economic interests invested in the fossil fuels
industrial system, which is, after all, the basic backbone
of our economies.
But also, you have to remember the doubts of ordinary people
who think that what they're being asked to do
is to give up their way of life.
The impacts of climate change are very, very complex.
Some areas of the world might even
get cooler or rainier at certain times,
while other areas of the planet get hotter and drier.
It could bring wildfires to California.
It could also bring the polar vortex to Chicago.
So the complexity of the changes that the planet is undergoing
and the way that scientists have spoken
about the statistical range of probabilities I think
has, in the past, contributed to some doubt.
It's a complicated picture.
But right now, what's clear is that when
it comes to things like the Paris climate change accord,
it's essentially America against most of the rest of the world.