Many of you may already know Rachel Carson, but for those who don't, she has been a heroine of mine for decades. She was a marine biologist and nature writer whose book, "Silent Spring," ignited the global environmental protection movement. In it she outlined the dangers of pesticides - asking her readers to imagine a world in which we no longer had bird songs because they'd all been poisoned. The book led to a nationwide ban on DDT and other pesticides and ultimately led to the creation of the US Environmental Protection Agency (EPA). An amazing woman.