Water purification breakthrough can even clean water from the Dead Sea

April 3, 2018 by  
Filed under Green

Comments Off on Water purification breakthrough can even clean water from the Dead Sea

Despite all our advances, access to clean water is still a major problem – not just for developing nations, but here in the US, where water shortages during natural disasters can cost lives. Scientists have created a cost-effective technology that addresses this problem using hydrogels. Using ambient solar energy, these gel-polymer hybrid materials can produce clean water from any source – including salt water from the Dead Sea. A team led by Guihua Yu at the University of Texas Austin created a hydrogel that is both hydrophilic and semiconducting. “We have essentially rewritten the entire approach to conventional solar water evaporation,” Yu said. The system works by creating water vapor under sunlight and then pumping the vapor into a condenser to deliver the freshwater. It also filters out contaminants that are harmful when consumed. Related: New MIT water purification method eliminates even trace chemical waste and pesticides The hydrogel -based solar vapor generator can desalinate water much more affordably than current options using much less power. “Water desalination through distillation is a common method for mass production of freshwater. However, current distillation technologies, such as multi-stage flash and multi-effect distillation, require significant infrastructures and are quite energy-intensive,” said Fei Zhao, a researcher involved in the project. Tests produced 25 liters of water per square meter – plenty for disaster-stricken areas or household use. Via Phys.org Images via UT at Austin

See the rest here: 
Water purification breakthrough can even clean water from the Dead Sea

69% of Republicans believe global warmings seriousness is generally exaggerated

April 3, 2018 by  
Filed under Eco, Green

Comments Off on 69% of Republicans believe global warmings seriousness is generally exaggerated

Have people changed their minds about global warming after President Donald Trump, infamous for his climate change denial, has spent a year in office? Gallup conducted their annual survey regarding the environment in early March, finding  that Americans’ thoughts on the topic “have increasingly become politically polarized” — and  Trump might have contributed to the divide. In 2017, 66 percent of Republicans thought “the seriousness of global warming is generally exaggerated.” In 2018, that number is now up to 69 percent. In contrast, four percent of Democrats think global warming is exaggerated, down from 10 percent last year. This is just one of Gallup’s findings — they said Americans’ concerns on the topic aren’t that different from last year, but some partisan views have shifted. They conducted telephone interviews between March 1 and 8 “with a random sample of 1,041 adults” residing in Washington, D.C. and all 50 states. Related: Despite Trump’s rhetoric, US officials are still working to stop climate change Is Trump to blame for the divide? Gallup said he may have contributed “by reversing a number of government actions to address the issue.” The announcement to pull America out of the Paris Agreement is perhaps the most notorious example; others include “the removal of climate change from the list of top U.S. national security threats and the elimination of the terms ‘global warming’ and ‘climate change’ from U.S. government websites and lexicons,” according to Gallup. 66 percent of Americans would “say most scientists believe global warming is occurring;” 64 percent say human activities caused the dilemma. These numbers fell a little from those in 2017; Gallup pinned that phenomenon on increased political polarization during the last year. Not all the numbers have dipped — 45 percent of Americans in 2018 “think global warming will pose a serious threat in their lifetime,” up from 42 percent in 2017. Gallup said the bottom line is that Americans’ higher level of concern over global warming, shown since 2016, remains largely intact. + Gallup News Images via Depositphotos ( 1 , 2 )

Read more from the original source: 
69% of Republicans believe global warmings seriousness is generally exaggerated

Bad Behavior has blocked 1287 access attempts in the last 7 days.