The idea is that we can use renewable energies like solar and wind where we can, like NFL stadiums and the White House, and conserve energy as well.

在我们可以使用太阳能和风能等再生能源的场所，例如NFL的体育馆和白宫，也同样需要节约能源。

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But without a regular sports team - an idea to play NFL games there appears to have stalled for the time being - they would struggle to justify their bid.

BBC: Deadline set for 2012 London Olympics stadium bids