What are some facts about light?

Define dew point. i am writing this part to be able to ask the question

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.