Environmental Policy

Unlocking the secret to cheaper solar power
July 25, 2016 01:23 PM - American Institute of Physics (AIP) via ScienceDaily

As climate change garners more attention around the world, scientists at the University of Virginia and Cornell University have made critical advances in understanding the physical properties of an emerging class of solar cells that have the potential to dramatically lower the cost of solar energy.

Solar cells remain a focal point of scientific investigation because the sun offers the most abundant source of energy on earth. The concern, however, with conventional solar cells made from silicon is their cost. Even with recent improvements, they still require a significant amount of electricity and industrial processing to be manufactured.

In 2009, energy researchers turned their attention to a class of materials called "metal halide perovskites," or MHPs. They are sprayed on like paint onto solid objects, says Joshua Choi, an assistant professor of chemical engineering at the University of Virginia. As the solution dries, the MHPs crystallize into a thin film that can be used to capture energy in a solar cell.

» Read Full Article
» Read More from Energy Topic

ADVERTISEMENT

A Major Source of Air Pollution: Farms
May 16, 2016 07:05 PM - Earth Institute, Columbia University

A new study says that emissions from farms outweigh all other human sources of fine-particulate air pollution in much of the United States, Europe, Russia and China. The culprit: fumes from nitrogen-rich fertilizers and animal waste that combine in the air with industrial emissions to form solid particles—a huge source of disease and death. The good news: if industrial emissions decline in coming decades, as most projections say, fine-particle pollution will go down even if fertilizer use doubles as expected. The study appears this week in the journal Geophysical Research Letters.

Agricultural air pollution comes mainly in the form of ammonia, which enters the air as a gas from heavily fertilized fields and livestock waste. It then combines with pollutants from combustion—mainly nitrogen oxides and sulfates from vehicles, power plants and industrial processes—to create tiny solid particles, or aerosols, no more than 2.5 micrometers across, about 1/30 the width of a human hair. The particles can penetrate deep into lungs, causing heart or pulmonary disease; a 2015 study in the journal Nature estimates they cause at least 3.3 million deaths each year globally.

» Read Full Article
» Read More from Ecosystems Topic

SPOTLIGHT

Is your makeup killing sharks?

Natalia Lima, Care2

Most animal lovers wouldn’t dream of harming an animal for fashion. Fur? No, thank you. Leather? I don’t think so. Yet they might be unknowingly killing sharks — and highly endangered kinds on top of that — for their beauty routine.

Unbeknownst to most, one little ingredient in products like sunscreens, moisturizing lotions, lip balms, lipsticks and face creams is responsible for the death of over three million sharks annually.

Killer ingredient

“Squalene is a naturally occurring compound found in large quantities in the liver of sharks,” explains the shark protection group Shark Trust. “A sharks’ large oily liver helps to control its position in the water column, however many cosmetics companies use the oil (and an associated compound called squalane) as a base for their moisturizing and skin care creams, lipstick and gloss, as it is non-greasy and softens skin.”

What's new on our Community Blog



Eco-friendly House Build

October 20th, 2015
Building a house requires a lot of thought, but why not incorporate an environmentally-friendly element into the process?
To read the full post and comment, visit the ENN Community Blog

Natural Disasters: Can We Help?

October 6th, 2015
Today's infographic outlines the worst natural disasters in human history, and identifies how we can best minimize the impact of these disasters.
To read the full post and comment, visit the ENN Community Blog

Organisms Named after Famous People

September 28th, 2015
From a beetle with biceps like Arnold Schwarzenegger to a wasp named after the Dementors from the Harry Potter series, there are some truly bizarre organisms that have been named after celebrities...
To read the full post and comment, visit the ENN Community Blog

Member Press Releases

More Press Releases

Terms of Use | Privacy Policy

2016©. Copyright Environmental News Network