Ond yn y cyfnod economaidd anodd sydd ohoni, gall llywodraethau ac awdurdodau gael eu temtio i ganolbwyntio ar flaenoriaethau economaidd ac anghofio am ymrwymiadau amgylcheddol neu gymdeithasol. Rhaid inni gofio mai’r amgylchedd a chymdeithas yw’r sylfaen ar gyfer llwyddiant economaidd; dyna sydd wrth wraidd ein hymrwymiad ni i ddatblygu cynaliadwy. Yn ogystal â chynnal ein system fywyd, mae’r amgylchedd naturiol  yn gwneud inni deimlo ein bod yn perthyn i’r byd o’n cwmpas ac yn ennyn teimladau llesol eraill; iechyd gwell; cymdeithas fwy cydlynol, rhagor o gyfleoedd am swyddi a llwyddiant hirdymor.
However during difficult economic times it can be tempting for governments and local authorities to focus on economic priorities and forget about environmental or social commitments. We must remember that it is the environment and society that underpin and enable our economic success and that is what our commitment to sustainable development means. The natural environment not only provides us with our life support system but also brings a sense of place, feelings of wellbeing; of better health, more social cohesion, increased job opportunities and long-term success. It even costs little or nothing to enjoy it when times are hard.