Most people know
that tobacco can harm the body. Why
do some people still use tobacco?

answer: Smoking tobacco damages your heart and blood vessels (cardiovascular system), increasing your risk of heart disease and stroke. ... Smoking causes high blood pressure, lowers your ability to exercise, and makes your blood more likely to clot. It also decreases HDL (good) cholesterol levels in the blood.  People say that they use tobacco for many different reasons—like stress relief, pleasure, or in social situations.

hope this helps

"Stopping or cutting back on tobacco causes symptoms of nicotine withdrawal. Withdrawal is both physical and mental. Physically, your body is reacting to the absence of nicotine. Mentally, you are faced with giving up a habit, which calls for a major change in behavior. Emotionally, you might feel like as if you’ve lost your best friend. Studies have shown that smokeless tobacco users have as much trouble giving up tobacco as cigarette smokers who to quit smoking."

Symtoms of withdrawl:

Dizziness (which may last a day or 2 after quitting)

Depression

Feelings of frustration, impatience, and anger

Anxiety

Irritability

Trouble sleeping, including trouble falling asleep and staying asleep, and having bad dreams or even nightmares

Trouble concentrating

Restlessness or boredom

Headaches

Tiredness

Increased appetite

Weight gain

Slower heart rate

Constipation and gas

Cough, dry mouth, sore throat, and nasal drip

Chest tightness

Visit https://www.cancer.org/cancer/cancer-causes/tobacco-and-cancer/why-people-start-using-tobacco.html for more info.

Have a good day! :)

answer; all of the above;

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