1.  These include components valuable to birds, such as temporary grassland, spring sowing and winter stubble.

2.  And, he said, immigrants are a valuable component of the economy.

3.  The reactor used highly-enriched uranium as fuel, which is a valuable component in making nuclear weapons.

4.  They do share many traits that make them valuable components in a growing medium.

5.  In Australia, the pea plants are considered valuable components of a pasture.