Common clay materials may help curb methane emissions

Methane is a far more potent greenhouse gas than carbon dioxide, and it has a pronounced effect within first two decades of its presence in the atmosphere. In the recent international climate negotiations in Glasgow, abatement ...

Health impacts of air pollution from Australian megafires

From October 2019 to February 2020, fire ripped through the Australian bush with unprecedented intensity, killing 34 people and more than 3 billion animals. In a new study, Graham et al. seek to quantify the health impacts ...

How animals repurpose genes to develop both limbs, eyes

The last common ancestor of cephalopods and vertebrates existed more than 500 million years ago. In fact, a squid is more closely related to a clam than it is a to a person. Even so, the two lineages independently evolved ...

Concentration

In chemistry, concentration is defined as the abundance of a constituent divided by the total volume of a mixture. Four types can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes in homogeneous solutions.

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