Earth Observatory : Home World of Change Satellite images showing how our world— forests, oceans, cities, even the Sun— has changed in recent decades. Read more Blue Marble Composite satellite images of the entire Earth. Earth at Night The night side of Earth twinkles with light in these composite global and regional views. Experiments Hands-on educational activities. Visible Earth A catalog of NASA images and animations of our home planet. NASA Earth Observations View, download, and analyze imagery of Earth science data. Earth Science Picture of the Day
WWF Together Biodiversity Global Warming Explained, In About A Minute : 13.7: Cosmos And Culture Jean-Pierre Clatot/AFP/Getty Images On a pleasant day in 2011, researchers roamed San Diego's public parks in search of volunteers to fill out anonymous surveys about global warming. In the end about 270 responses were collected from a mix of park visitors and nearby community college students. The results were sobering. The solution to this puzzle comes from an important asymmetry: the sunlight that hits the Earth's surface is largely visible light, and that light is returned from Earth's surface as infrared light. Michael Ranney, the lead author on the study, offers this 35-word explanation: Earth transforms sunlight's visible light energy into infrared light energy, which leaves Earth slowly because it is absorbed by greenhouse gases. This and related research has led Ranney and his colleagues to launch a new website, howglobalwarmingworks.org, that educates people about the basic mechanisms of global climate change. If Ranney's right, then 52 seconds could make all the difference.
Global Warming Ecological Footprint Quiz by Center for Sustainable Economy Pollution Carbon Connections Earth Observatory : Home World of Change Satellite images showing how our world— forests, oceans, cities, even the Sun— has changed in recent decades. Read more Blue Marble Composite satellite images of the entire Earth. Read more Earth at Night The night side of Earth twinkles with light in these composite global and regional views. Experiments Hands-on educational activities. Visible Earth A catalog of NASA images and animations of our home planet. NASA Earth Observations View, download, and analyze imagery of Earth science data. Earth Science Picture of the Day
Climate change: Rising sea levels hit Maputo, Rotterdam When people talk about the impact of rising sea levels, they often think of small island states that risk being submerged if global warming continues unchecked. But it's not only those on low-lying islands who are in danger. Millions of people live by the sea - and are dependent on it for their livelihoods - and many of the world's largest cities are on the coast. By 2050 the number of people living in delta cities is set to increase by as much as 70%, experts suggest, vastly increasing the number of those at risk. To shed light the impact of rising sea levels, we are taking a close look at two very different cities, Rotterdam and Maputo , and their varying responses to the problem. Much of Rotterdam - Europe's busiest port city - lies several metres below sea level, and this vulnerable position has led it to develop some of the best flood protection in the world. Weaker Gulf Stream Off the Netherlands, for example, sea levels rose by some 20cm in the last 100 years. "We need to invest.
Earth Observatory : Home World of Change Satellite images showing how our world— forests, oceans, cities, even the Sun— has changed in recent decades. Read more Blue Marble Composite satellite images of the entire Earth. Read more Earth at Night The night side of Earth twinkles with light in these composite global and regional views. Experiments Hands-on educational activities. Visible Earth A catalog of NASA images and animations of our home planet. NASA Earth Observations View, download, and analyze imagery of Earth science data. Earth Science Picture of the Day
The Nitrogen Cycle Game | UCAR Center for Science Education The Nitrogen Cycle Nitrogen is an element that is found in living things like plants and animals, dead things like fallen leaves and dear animals, and non-living things like air and water. The nitrogen cycle is one of the biogeochemical cycles and is very important for ecosystems. Nitrogen cycles slowly, stored in reservoirs such as the atmosphere, living organisms, soils, and oceans along its way. Most of the nitrogen on Earth is in the atmosphere. Certain actions of humans are causing changes to the nitrogen cycle and the amount of nitrogen that is stored in reservoirs.