Deforestation has recently been recognized as a global problem. Even today, governments and individuals believe that only the countries using up their forests will be affected by it. However, scientists are convinced that the world’s forests must be preserved. They base their conviction on scientific data that prove the importance of forests to all people everywhere.
(Taken from Between the Lines)
GLOSSARY
data – dados
deforestation – desmatamento
to recognize – reconhecer
to use up – consumir totalmente
A similar meaning to the modal verb “must”, is