The scale of this change may have provided an opportunity for people to relinquish unsustainable ways of living and adopt more environmentally-beneficial habits.
Efallai fod graddfa'r newid hwn wedi rhoi cyfle i bobl roi'r gorau i ffyrdd anghynaliadwy o fyw a mabwysiadu arferion sy'n fwy buddiol i'r amgylchedd.