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Six minutes English.
From bbclearningenglish.com Hello and welcome to Six Minute English, I'm Alice.
How do I'm Neil?
I'm feeling a bit chilly today, Alice.
Mmm, yes, it is unseasonably cold today.
Which means not normal for the time of year.
But the weather is very unpredictable these days.
Mmm, I know what you mean.
Global warming is the subject of today's show.
Is global warming really something to worry about?
Some people say that the earth has warmed up in the past and nothing terrible's happened.
The earth has warmed up before,
but this was the result of things like wobbles in the earth's orbit,
not because of an increase of greenhouse gases in the atmosphere.
Can we reverse the changes?
No, it's too late.
And now we have to find ways to adapt to extreme weather,
rising sea levels and melting polar ice caps.