Climbing the mountain every morning is my daily routine.

Climbing up the slope requires physical strength.

He has physical strength, so he can work for a long time.

Due to the impact of the new coronavirus, the number of patients has risen to 3,000.

Your cooperation is needed for this project.

I need you.

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.