Nontoxic means a product is: a] will not stain your clothes b} good for landfills c]good for the earth d]not poisonous to humans

d]not poisonous to humans

Explanation:

A toxic product is the product which consists of ingredients that are poisonous. It is capable of producing allergic or detrimental physiological responses in human beings or any other living being. The non-toxic product is a product that does not contain any poisonous ingredient. The non-toxic product is safe to eat and breathe. These products do not cause any damage to the environment. These products do not result in producing allergic or other detrimental responses such as hormone disruption, cancer and other problems related to human beings.  

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made