Fill in the blanks with the best possible answers

We’ve heard it before 1.Tobacco products are dangerous. THey cause heart disease, 2. disease, lung 3. and other cancers. But what makes tobacco products so 4. Dangerous? The truth is, it comes down to chemicals found in every 5. of development. FRom growing the
6. to 7. the product, to 8. it.

This mix of chemicals harms almost every 10. in the human body. 11. naturally exists in a tobacco plant, serving as it’s
pesticide against 12. and animals. Nicotine is the chemical that causes
13. . And it's the 14. reason it's so hard to quit smoking
once you start. It can change the way you're 15. works, causing you
to 16. more nicotine. Where tobacco is 17. can affect its
chemical content. Heavy 18. like cadmium and lead are often found in the
soil and fertilizers usually 19. nitrates that build up in the plant as it
grows and are 20. When the tobacco is burned. All 21. even
those advertised as natural, organic or additive 22. have chemicals that
could cause serious 23. To your health. After a 24.
summer the tobacco plants are ready for harvest. Soon the leaves will be on their way to
the 25. .