( ( In ( light ( of ( ( the increase ) ( of ( ( atmospheric CO2 ) ( due ( to ( ( ( deforestation and ) burning ) ( of ( fossil fuel ) ) ) ) ) ) ) ) ) ) ) ( , ( they ( also ( ( ( act ( as ( ( a buffer ) ( of ( ( the ( atmospheric increase ) ) ( of ( the ( greenhouse ( gas CO2 ) ) ) ) ) ) ) ) ) ( by ( ( taking up ) ( ( almost 2 ) ( of ( ( ( the ( 5 Gigatons ) ) ( per year ) ) ( that ( are released ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (PP (IN In) (NP (NP (NN light)) (PP (IN of) (NP (NP (DT the) (NN increase)) (PP (IN of) (NP (NP (JJ atmospheric) (NN CO2)) (ADJP (JJ due) (PP (TO to) (NP (NP (NN deforestation) (CC and) (NN burning)) (PP (IN of) (NP (JJ fossil) (NN fuel)))))))))))) (, ,) (NP (PRP they)) (ADVP (RB also)) (VP (VBP act) (PP (IN as) (NP (NP (DT a) (NN buffer)) (PP (IN of) (NP (NP (DT the) (JJ atmospheric) (NN increase)) (PP (IN of) (NP (DT the) (NN greenhouse) (NN gas) (NN CO2))))))) (PP (IN by) (S (VP (VBG taking) (PRT (RP up)) (NP (NP (QP (RB almost) (CD 2))) (PP (IN of) (NP (NP (DT the) (CD 5) (NNS Gigatons)) (PP (IN per) (NP (NN year))) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN released)))))))))))) (. .)))
In light of the increase of atmospheric CO2 due to deforestation and burning of fossil fuel, they also act as a buffer of the atmospheric increase of the greenhouse gas CO2 by taking up almost 2 of the 5 Gigatons per year that are released.
(ROOT (S (NP (JJ Co2) (NN gas)) (VP (VBZ is) (VP (VBN released) (PP (IN into) (NP (NP (DT the) (NN atmosphere)) (SBAR (WHADVP (WRB when)) (S (NP (JJ fossil) (NNS fuels)) (VP (VBP are) (VP (VBN burned))))))))) (. .)))