answer: #Person2# went to a global warming rally in London last weekend. #Person2# suggests using public transport and renewable energy, and taking recyclable items to a recycling center to protect the environment. #Person2# thinks the issue of greatest concern is having enough clean water for everyone.
documents: #Person1#: what did you do over the weekend?
  #Person2#: I went a global warming rally in London. It was fantastic to be around so many people who care about the environment.
  #Person1#: do you think there's anything we can do to reverse the damage that's been done already?
  #Person2#: it might not be possible to fix the problems that we've created for ourselves, but there are lots of things we can do to prevent more damages from happening.
  #Person1#: like what?
  #Person2#: well, we can use public transport instead of taking our cars for a start.
  #Person1#: what else can we do to protect the environment?
  #Person2#: if you do have to drive, you should make sure that your car runs on unleaded petrol. Also, your home should use sources of renewable energy.
  #Person1#: how about recycling? Does that actually help?
  #Person2#: yes. You should take your glass, paper, plastic, cardboard, and tin cans to a recycling center.
  #Person1#: what do you think is the biggest worry for our future?
  #Person2#: I think that the issue of greatest concern is having enough sources of clean water for everyone.
  #Person1#: I had no idea you were such as environmentalist before!
  #Person2#: to be honest, in order for the earth to continue to be a habitable place, we're all going to have to become more interested in the environment.