availability

发表于 2020-05-16 availability romer pandemic

In this bonus episode of EconTalk, economist and Nobel Laureate Paul Romer discusses the coronavirus pandemic with EconTalk host Russ Roberts. Romer argues that…

Grazing Cattle Trim the Menu for Birds

发表于 2017-08-31 trim menu grazing

When cattle graze the desert's natural landscape, birds face changes in food availability—and some species are unable to adapt. Jason Goldman reports. Learn mor…

Suicide Differences by Region Related to Gun Availability

发表于 2016-01-29 adchoices differences *******

The presence of a gun increases the likelihood that someone in the home will die a violent death, particularly by *******. Learn more about your ad choices. Vis…

Garbage Pickings Get Storks to Stop Migrating

发表于 2016-03-24 pickings storks migrating

Some white storks have stopped migrating from Europe to sub-Saharan Africa in the winter, because of the availability of food in landfills. Learn more about you…

Beaver Dams Strengthened by Humans Help Fish Rebound

发表于 2016-07-26 strengthened rebound dams

Fish flourished in creeks in which human engineers helped shore up beaver dams made weak by poor timber availability. Learn more about your ad choices. Visit me…