The Versatility and Beauty of Elm Trees: Uses and Growing Environment

In China, the elm tree is a auspicious species and has always been the most popular. It is often found on slopes and roadsides and is harvested in summer and autumn, either used fresh or dried. S

How Long Does Formaldehyde Take to Dissipate?

Everyone knows that formaldehyde is a harmful gas, and they also know that newly renovated houses cannot be inhabited immediately. So the question is, how long does it take for formaldehyde to dissi