Some areas of Joshua Tree National Park in California, for example, can no longer support the trees that the park is named for.

VOA: special.2009.09.28

That is in addition to billions of dollars of aid to the Middle East and North Africa, including a $700-million Millennium Challenge Corporation grant to Morocco for fruit tree farming and small-scale fisheries as well as stronger financial services and enterprise support.

VOA: standard.2009.11.03

If the roots extend past three feet, chances are good that they can support the tree.

WSJ: Getting to the Roots of Your Trees' Stress

Timberland and Smallholder Farmers Alliance are helping local farmers learn how to improve crop yields, develop eight community tree nurseries and support agricultural training centers in the region.

FORBES: Timberland Helps Plant 2.2 Million Trees In Haiti

Six projects will seek people to give their time to youth groups, mentoring, sports coaching, tree planting and learning support for older people.

BBC: London scheme launched to find 10,000 volunteers