Search the Internet for an article about a recent environmental disaster.

Consider the following questions as you read the article:

• How did human actions contribute to this disaster?
• Which biotic and abiotic factors were involved?
• How did the disaster affect the flow of materials and energy in the ecosystem

Review the Crash Course: Ecology videos on the Khan Academy website.

Consider the following questions as you watch the videos:https://www.khanacademy.org/science/biology/crash-course-bio-ecology

• How do biotic and abiotic environmental components interact, and how does this affect population growth and regulation?
• How have human activities affected ecosystems and the biosphere?
• How do energy and materials flow in an ecosystem?