This question is for brilliant student . how to increase oxygen or how oxygen increased in earth because in many years ago at past earth has only have 2% of oxygen but know it has 22% of oxygen​

When geographers describe how two places are related to each other spatially, they are describing a. where the places are located in relation to one another b. what kinds of natural environments are around each place c. how each place is changing over time d. what kinds of cultures are in each place

Explain how earths tilt and revolution around the sun affects weather and climate

What are some of the impacts of humans on the earth?