This is a download from BBC Learning English.
To find out more, visit our website.
The English we speak from bbclearningenglish.com welcome back.
Fei Fei.
Good holiday?
The best, Neil.
We flew to Mexico, then up to California and then drove all the way across the States from LA to New York.
Incredible.
All in one week.
Yes.
It's just the.
What?
I can't help thinking all that travelling can't be great for the environment.
I know you must have a pretty big carbon footprint right now.
Enormous.
Let's take a moment to explain this phrase, carbon footprint, then plan what to do about it.
Carbon dioxide is a gas that contributes to climate change.
And your carbon footprint is the amount of carbon dioxide you produce through your activities.
Things like how much electricity you use.
How much oil and gas you use.