News tagged with water stress

Related topics:

Time to find a second Earth, WWF says

Carbon pollution and over-use of Earth's natural resources have become so critical that, on current trends, we will need a second planet to meet our needs by 2030, the WWF said on Wednesday.

Oct 13, 2010 3.4 / 5 (17) 46

Going out on a (redwood tree) limb

How tall can a tree grow? Does sunlight or water limit the size and photosynthetic capacity of a leaf? Could constraints on leaf growth really determine the height of a tree? These are all questions that ...

Jun 28, 2010 5 / 5 (6) 0

Mesquite trees displacing Southwestern grasslands

As the desert Southwest becomes hotter and drier, semi-arid grasslands are slowly being replaced by a landscape dominated by mesquite trees, such as Prosopis velutina, and other woody shrubs, a team of University ...

Mar 18, 2012 4.8 / 5 (6) 13 | with audio podcast

Tree die-off triggered by hotter temperatures

A team of scientists, led by researchers at Carnegie's Department of Global Ecology, has determined that the recent widespread die-off of Colorado trembling aspen trees is a direct result of decreased precipitation exacerbated ...

Feb 11, 2013 5 / 5 (5) 8 | with audio podcast

US intelligence sees fight ahead over water, food

(AP)—Nearly two-thirds of the world's population will live in cities by 2030, with most people middle class, connected by technology, protected by advanced health care and the United States and China perhaps cooperating ...

Dec 10, 2012 4.3 / 5 (4) 3