Why does urban biodiversity matter at all? Because according to the UN, for the first time in human history more people are now living in cities than rural areas. The planet is urban. When people experience nature, that nature will be urban too.
Although they lag behind their European counterparts, American cities are becoming more and more bike-friendly. A growing number are launching bike sharing schemes -- New York and Chicago being the latest -- and bike lanes continue to grow in mileage nationwide.
The bike ride recently organized by the mayor of a small central New Jersey town was emblematic of a cultural shift, a national movement toward embracing so-called "alternative'' modes of transportation.
City Park in New Orleans has mostly recovered from Katrina's wrath in 2005, and is building attractions to generate greens fees, entry tickets, concession sales, catering and equipment rentals to cover its operating expenses.