It should be Ozone, hope that helps.
Trees release CO2 which is Oxygen.
Plants release water vapor through Photosynthesis.
We could possibly use water as a fuel source, rather than fossil fuels (which are limited)
Science has already developed something of the sort, and with using water as a fuel source for say vehicles and such, it's inevitable for a positive change to happen because there would be less carbon monoxide; which means less polution.
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Punta kana iintayin kita hahaha
Answer:
They occur when the Sun reaches its highest or lowest point in the sky.
