A few growers place charcoal in the bottom of containers to absorb excess salts and maintain sweet soil, if plants are grown more than a few months.
The charcoal is heavy
A: It's impossible to say

The results of numerous epidemiological studies and recent clinical trials provide consistent evidence that diets rich in fruits and vegetables can reduce the risk of chronic disease.
Chronic diseases are linked to the kinds of food we eat.
A: Yes

In 1955, the Aurora Borealis, a coating applied to crystal stones to produce a "rainbow of colors" effect was introduced.
Aurora Borealis crystals remind people of the natural phenomenon
A:
It's impossible to say