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Environmental Science

Across
Presence of harmful substances
Increasing amount of co2 in the oceans
Industrial chemicals
Removal of trees
Variety of life in the world
Prolonged period of no rainfall
Capable of being renewed
Colorless, odorless nature gas
Down
Highly toxic compound
Gradual increase in overall temperature
Small clump of cells
Can't be renewed
Envelop of gasses surrounding the earth
The act of felling trees
Synthetic materials