In an interview for an upcoming documentary

In an interview for an upcoming documentary on the state of the environment, Colorado farmer, Pamela Bliss, concluded that there is no such thing as global warming. In defending her position, Bliss claimed that her lettuce crop had improved steadily over the last 5 years, her potato crop had improved over the last 7 years and therefore, Earth's conditions are at their best and getting better and global warming is a myth

1. Is Pamela’s argument valid? Why or why not?

2. Is Pamela’s argument sound why or why not

3. Provide an example of a valid argument that is also sound.