An aluminum can has a smaller carbon footprint than the glass bottle .

铝合金罐的碳足迹要小于玻璃瓶。

Perhaps you 're trying to reduce your carbon footprint .

或许你是要减少你的碳足迹。

It was a footprint-the footprint of a man !

那是一个脚印一个人的脚印！

That would also settle the carbon footprint .

这样还能解决碳足迹的问题。

Do you consider your carbon footprint ?

你会考虑碳足迹吗？