Water pushes against the buttress dam, but the buttresses push back and prevent the dam from toppling over. The weight of the buttress dam also pushes down into the ground.

The environmental jobs program is vulnerable to Republican gains this week. Democrats and environmental advocates want to make a climate jobs program the law of the land — and they may be ...

This allows water to run off the leaves quickly without damaging or breaking them. Buttress roots close buttress rootsA tree root that grows above the forest floor to provide nutrients and support.