谁知道北京地铁十号线的环境变化公益广告那英文because it hurting the world后面那句？？

广告视频：
http://v.youku.com/v_show/id_XMTE2MzgxNzAw.html
以下是广告全文
Um,Mummy,why did you say that we need to think about the way we travel?
Because it is hurting the world.
And if we carry on travel on our own, things could get worse and worse,
But, my teacher also says, if we travel together, things could get better and better.

Choose public transport, and help to reduce the carbon emissions and contribute to climate change, the world is your home, look after it.