Why wildfires are necessary - Jim Schulz

source: TED-Ed     2016年2月2日
View full lesson: http://ed.ted.com/lessons/why-wildfir...
Our early ancestors relied on lightning to cause forest fires, from which they could collect coals and burning sticks to help them cook food and clear land. Yet, it wasn’t just humans who benefited from these natural phenomena. Even as they destroyed trees, fires also helped the forests themselves. Jim Schulz outlines the benefits of wildfire.
Lesson by Jim Schulz, animation by Provincia Studio.