1.The Dutch company Nerdalize thinks paying for electricity to operate the servers and then paying again to cool them is a waste of energy.
pay for 赔偿;为…而付钱;为…付出代价
Of course, I'm quite willing to pay for the lost bike.
当然,遗失了自行车我愿意赔偿 。
You have acted foolishly and you will pay for it.
你干了些蠢事,你会因此而得到报应 。
2.in that way, homeowners actually get heating for free, and computer users don't have to pay for the overhead of the data center.
for free 免费地,无偿地
I wasn't expecting you to do it for free.
我并没有指望你白干 。
Why waste £50 when you could get it for free?
能够免费得到为什么还要浪费50英镑呢?