... Rocky Mountains, are already constrained by climate, and are likely to face extreme stress and disappear entirely in some places. Global warming suggests the potential for forests to break up into an assortment of forests, savannas, and grasslands. Major adjustments to natural ecosystems due to climate change could have negative consequences for our economy, which depends in part on the ... return to the atmosphere. Trees also have a crucial role in the oxygen cycle: they make up an essential part of one of the world's life support systems. Agricultural expansion into forestland is the ...

• Word Count: 700
• Approx Pages: 3
• Grade Level: Undergraduate