It's not steroids. It's not the stitching on the baseball. It's not better training regimens. It's not new bat technology. Nope, it's global warming causing all of those dingers to be hit:
Baseball's Tim McCarver: Global Warming Increasing the Number of Home Runs"It has not been proven, but I think ultimately it will be proven that the air is thinner now, there have been climactic changes over the last 50 years in the world, and I think that’s one of the reasons balls are carrying much better now than I remember," McCarver said during Saturday's game between the Milwaukee Brewers and the St. Louis Cardinals.