A satellite made of wood

Satellites are usually made of different kinds of metals. However, these metals are not eco-friendly, especially the particles (微粒) left when they are burned. These particles will float around in Earth’s stratosphere (平流層). This is where the very important ozone layer is found. The ozone layer helps protect us and other living creatures from the harmful ultraviolet radiation (紫外線輻射) from the sun.  In addition, these particles ...Read More