What Can 1 Million Trees Do? [INFOGRAPHIC] Environment - Sustainability - Climate Change is in our hands - Arbor Day Foundation - The Nature Conservancy - Earth Day Network - National Park Foundation - Mother Nature Network
“When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable "trophic cascade" occurred. What is a trophic cascade and how exactly do wolves change rivers?
THE UN’s latest World Population Prospects forecasts a rise from billion people today to billion in more than it had previously estimated. This reflects increasing fertility rates in populous countries, particularly in sub-Saharan Africa.