Sup,
Erase one horrible tragedy from history can be anything bad. For example 9/11. You could erase it like it never happened and nobody lost anybody that day.(messing with time though would be unpredictable)
Also, global warming is controversial to some people. But I'm assuming most of you believe that it's not. Most people in the world agree with the global warming thing. So for that one, you can prevent global warmer by reversing the negative effects.
Hope you guys enjoy the WYR. New WYR [u]every[b] Wednesday[/b][/u]. Peace.
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We can chose to discover perhaps one of the greatest mysteries of the universe, which is proof of extra terrestrial beings. We can chose to eliminate one tragedy from the existence of history, possibly saving thousands of lives. We can chose to find out when the world is going to end, which would possibly give us adequate time to evacuate this planet and save our existence. [spoiler]But Offtopic picks the fking fighting style option...[/spoiler]