Open-Land Resources June 22, 2015

New NASA data show how the world is running out of water 21 of the world’s 37 largest aquifers have passed their sustainability tipping points, meaning more water was removed than replaced during the decade-long study period Underground aquifers supply 35 percent of the water used by humans worldwide Rain-starved California is currently tapping aquifers for 60 percent of its water use as its rivers and above-ground reservoirs dry up, a steep increase from the usual 40 percent. The aquifers under the most stress are in poor, densely populated regions, such as northwest India, Pakistan and North Africa. A 2012 study by Japanese researchers attributed up to 40 percent of the observed sea-level rise in recent decades to groundwater that had been pumped out, used by humans and ended up in the ocean

History People grow trees for many reasons Silviculture USDA Forest Service

The American Conservationist Movement Yellowstone Theodore Roosevelt – Preservationist School – Wise-use School

National Parks Movement New Deal The American Conservationist Movement

A Global Perspective on Forests Vegetation of any kind can affect the atmosphere in four ways:

Approaches to Forest Management Managing forests can involve:

Major Forestry Issues Sustainability Clear cutting vs Selective cutting Old-growth forest Plantations

Major Forestry Issues Stream-protection zones National forests Forest fires The citizen’s role