Tough is not enough: How a journey through three contintents, with a kayak, changed a climatewarriorIt echoed around my head. The carbon wing blade flexed in the water as I thrust like a man possessed. Past the point of no return, I was above the log jam. A broken blade, maybe even a missed stroke and that could be my last. The river was rough, it was ugly and I was bouncing like a cork. Lovers of adventure will thrill at the task Steve Posselt set himself on the biggest kayak trip of his life. Up the Mississippi, through the canals of the US and