The only crop affected by changes in ozone during April is winter wheat.
In April, winter wheat was impacted by ozone variations.
All crops showed ability to adapt to changing ozone levels all year round.
The man is a clown that is in full make-up and costume, preparing to entertain a birthday party.
There are some dogs and some people and some machines.
A man is sitting in front of bottles.
Two people are outside.
The man is playing baseball.
A person is riding a snowboard.