Water conservation is one of the environment's most dire, important issues. Research suggests that two-thirds of the world's population will face water scarcity by 2025. Thomas Kostigen, NY Times best-selling environmental author, believes "the biggest environmental crisis facing us today is water, and that's something that we really need to focus on. In our towns, our communities and our country, we need to focus on better use of water, better water management." (Source: New York Times / Photo: Flickr)