Enn Original News
COLLEGIATE CORNER: Fossil Fuels vs. Renewable Resources
February 24, 2014 01:07 PM - Flavio Avalos, Class of 2015, Wakefield High School, Arlington, VA
Fossil fuels have been the main source of the energy all over the world. They increase the amount of CO2 emissions, and the emission of CO2 is a great cause of global warming in the atmosphere, destroying the atmospheric layers. What can we do to lower the demand of fossil fuels and become more eco friendly with renewable energy resources? The percent of US transportation sector consumption is 95.4% fossil fuels (Article 3), and this shows the reliance of the US on fossil fuels. As the Institute for Energy states, "Fossil Fuels make modern life possible" and that the only reason that our modern society works and the privileges we get are all due to the fact of fossil fuels (Article 3). Need I remind you: fossil fuels are limited and could go out?
Report Finds 42,000 Turtles Harvested Each Year by Legal Fisheries
February 21, 2014 10:05 AM - Allison Winter, ENN
Conservation awareness for sea turtles has made great progress recently, however the species are still under threat. Not only are hundreds of thousands of sea turtles killed each year from bycatch and illegal fishing but, in many coastal communities, sea turtles are considered a food source. Despite having spiritual or mythological importance, human populations consume both turtle eggs and meat. A new study conducted by Blue Ventures Conservation and staff at the University of Exeter's Centre for Ecology and Conservation has found that 42 countries or territories around the world still permit the harvest of marine turtles — and estimates that more than 42,000 turtles are caught each year by these fisheries.
Fracking residual waters
February 18, 2014 09:40 AM - Robin Blackstone, ENN
As fracking amongst Marcellus Shale in the northeastern part of the United States increases so does the concern over its process. Fracking is done utilizing a hydraulic fracturing process, which pumps a high-pressure mixture of water, chemicals and sand deep into the sedimentary formations to extract naturally occurring gas. The resultant wastewater is then stored in large impoundment ponds and closed container tanks until it can be piped to wastewater treatment plants. Once cleaned it is discharged into local streams or trucked to Ohio to be pumped deep down into another injection well or into another fracking operation.
Predicting the Climate of the future
February 15, 2014 10:44 AM - Roger Greenway, ENN
Climate scientists rely on models to predict how the weather and climate will respond to changes in variable such as CO2 emissions, natural methane emissions, solar intensity and a host of other factors. No individual model can claim to accurately predict future climate. So it is very important to look at multiple models and compare their predictions. The Carnegie Institution for Science is a leader in this area. The pace of global warming over the last century has been about twice as rapid over land than over the oceans and will continue to be more dramatic going forward if emissions are not curbed. According to an analysis of 27 climate models by Carnegie's Chris Field, if we continue along the current emissions trajectory, we are likely facing the most rapid large climate change in the last 65 million years. This will clearly pose great challenges for a variety of terrestrial ecosystems.
ENN SPANISH SECTION
February 14, 2014 10:59 AM - Anastasio Carranza, ENN
ENN initiates a section in spanish
Spotting Whales from Space!
February 13, 2014 08:05 AM - Allison Winter, ENN
Counting individuals of a species is important in order to track wildlife trends. Absence or decline of a species could mean detrimental habitat modifications or that parts of the ecosystem are unbalanced. For marine populations though, trying to count and monitor these species is often a daunting and expensive task as finding these individuals in the vast ocean can be like looking for a needle in a haystack. Thankfully, scientists lead by the British Antarctic Survey (BAS) have demonstrated how new satellite technology can be used to count whales, and ultimately estimate their population size.
Calculating your water footprint
February 10, 2014 11:01 AM - Robin Blackstone, ENN
Water scarcity affects 2.7 billion people worldwide for at least a month each year and in the same way that each of us has a carbon footprint, Professor Arjen Hoekstra of the University of Twente in the Netherlands posits that every person also has a "water footprint". Our water footprint is calculated by counting the amount of fresh water that we each use daily and the amount of water required to produce the goods and services that we consume. Due in large part to our monthly water bill, we recognize our daily fresh water use more than we do the amount of water that it takes to produce other foods and products that we consume. We more commonly think about water consumption in terms daily showers dishwasher and sprinkler usage or dripping spigots.
The first big bite!
February 7, 2014 11:43 AM - Gareth Trickey, University of Toronto
The first top predators to walk on land were not afraid to bite off more than they could chew, a University of Toronto, Mississauga study has found. Graduate student and lead author Kirstin Brink and U of T Biology Professor Robert Reisz suggest that Dimetrodon, a carnivore that walked on land between 298 million and 272 million years ago, was the first terrestrial vertebrate to develop serrated ziphodont teeth. According to the study published in Nature Communications, ziphodont teeth, with their serrated edges, produced a more-efficient bite and would have allowed Dimetrodon to eat prey much larger than itself. While most meat-eating dinosaurs possessed ziphodont teeth, fossil evidence suggests serrated teeth first evolved in Dimetrodon some 40 million years earlier than theropod dinosaurs.
USGS Develops Tool to Help Track Oil Spills
February 7, 2014 10:57 AM - Allison Winter, ENN
Each year, tons of oil can be spilled into the ocean. Whether it comes from an oil tank spill, a leak that occurs during offshore drilling, or even natural seeps that occur within the ocean, oil spills can cause grave environmental and economic damage to marine and coastal ecosystems. When an oil spill occurs, the oil that floats on water will usually spreads out rapidly across the water surface to form a thin layer called an oil slick. As the oil continues spreading, the layer becomes thinner and thinner, eventually turning into a thin layer called a sheen. Managing and predicting the spread and path of oil is often very difficult for first-responders and clean up crews, however, a newly developed computer model holds promise to helping scientists track a spill. U.S. Geological Survey scientists developed the model as a way of tracking the movement of sand and oil found along the Gulf of Mexico since the Deepwater Horizon oil spill.
Achoo! Native Echinacea angustifolia plant is blown away
February 5, 2014 08:17 AM - Robin Blackstone, ENN
Echinacea, a genus of flower in the daisy family is sold in many over-the-counter cold and flu remedies and sold in pharmacies and health and nutrition stores. Echinacea has nine wild species in eastern and central North America that grow in moist to dry prairies and in open wooded areas. The genus includes the purple coneflower, pale purple coneflower and narrow-leaved purple coneflower. All have large magenta petals that unfurl from early to late summer.