Upmod for effort but I don't see this as equating to 100% certainty. The preceding sentences mention a variety of possible causal agents of climate change. In c

Upmod for effort but I don't see this as equating to 100% certainty. The preceding sentences mention a variety of possible causal agents of climate change. In context the statement then is really 'Of the causes we have been able to identify - Only anthropogenic forcing of climate, however, can explain the recent anomalous warming in the late 20th century.' I also see 'can explain' is 'the we can explain'. You are encouraged not to use the first person in these sort of papers.