The torch must be carried back and forth across the bridge, so one person must go back with the torch to help others cross. Person A can cross the bridge in 1 minute, Person B in 2 minutes ...
Could exercising just one minute ... can run, bike, hop on the elliptical, or really any activity that gets your heart pumping. But you have to push yourself really hard during those 20 seconds ...
It's a revolutionary way to speed up the natural process, given that waiting for dead organisms to decompose can take millions ... to convert to biocrude within one minute. Algae biofuels have ...