Water scarcity predicted to worsen in more than 80% of croplands globally this century
Agricultural water scarcity is expected to increase in more than 80% of the world’s croplands by 2050, according to a new study in the AGU journal Earth’s Future.
The new study examines current and future water requirements for global agriculture and predicts whether the water levels available, either from rainwater or irrigation, will be sufficient to meet those needs under climate change. To do so, the researchers developed a new index to measure and predict water scarcity in agriculture’s two major sources: soil water that comes from rain, called green water, and irrigation from rivers, lakes and groundwater, called blue water. It’s the first study to apply this comprehensive index worldwide and predict global blue and green water scarcity as a result of climate change…READ ON
Could scientists accidentally destroy the Earth with a lab-grown black hole?
What happens when science goes wrong, and humankind’s technological hubris causes global calamity? Usually, the credits roll, these types of scenarios are almost always science fiction. But, since it’s black hole week at NASA, we thought we’d have a little fun imagining the complete and accidental annihilation of our planet.
You have almost nothing to fear from black holes. Of course, “almost” nothing isn’t the same as absolutely nothing. And that means, theoretically speaking, there’s at least a greater-than-zero-percent chance that scientists could accidentally create a dangerous black hole in a laboratory.
Back in the 1930s, there was a brief moment when some of the physicists working with Einstein on the atom bomb stopped to wonder if exploding such a device would end up lighting the Earth’s atmosphere on fire and destroying the entire planet.
The team did some quick math and decided it wasn’t likely, and that was the end of that…READ ON