Other
Clean Air Revival: Burning Issues: Constituents of Wood Smoke
Site has several articles on particles from wood smoke and its health effects.
Read Works
Read Works: Adventure on a Hot Air Balloon
[Free Registration/Login Required] This first person account describes a hot air balloon trip. This passage is a stand-alone curricular piece that reinforces essential reading skills and strategies and establishes scaffolding for...
Other
Conservation International
Articles, videos, and photos on the topic of world conservation such as green health, air quality, and climate change.
Khan Academy
Khan Academy: What Is Newton's First Law?
Newton's First Law also called the law of inertia is the most important thing to realize about motion. This article offers more information on motion and explains solved problems involving Newton's First Law. Also included is a video...