Rearrange the parts of the sentence in correct order.
Deforestation, land clearance and use
P: of greenhouse gases in the atmosphere
Q: of fossil fuels causes soaring
R: which are responsible for global warming

The correct sequence is QPR.
The opening phrase "Deforestation, land clearance and use..." requires a prepositional object to complete the concept. Part Q ("of fossil fuels causes soaring") logically links to it, completing the compound subject dynamic ("use of fossil fuels") and introducing the verb ("causes").

"Soaring" acts as a modifier for what is increasing. Part P ("of greenhouse gases in the atmosphere") logically follows "soaring" to clarify what is rising.

Part R ("which are responsible for global warming") contains the relative pronoun "which", which properly refers back to the plural noun "greenhouse gases" mentioned at the end of part P.

Hence, the coherent arrangement is Q-P-R.