I often go birdwatching in the park on weekends.

You need to use your head to solve this problem.

He is using that coat from winter to spring.

This greenschist is geologically very interesting.

This area is rich in green tuff.

His new car is yellow-green.

I bought a new highlighter.

The fluorescent lamp broke, and the room became dark.

It is reported that North Korea has conducted another nuclear bomb test.

He is looking for a proving ground to test his new theory.