**1. Introduction**

The "Doomsday Clock" is a construct of the bulletin of atomic scientists that serves as a barometer for humanity's nearness to irreparable destruction. Midnight hour on the clock is designated to be the instance of ignition and thus, the point of no return from disaster. On 24th January 2023, the Doomsday Clock got to 90 seconds before midnight. This was the closest the clock had ever been to humanity's insertion into the extinction process. Analyses by the bulletin of atomic scientists indicated that the threats of war (biological, chemical, nuclear); disease (zoonotic epidemics and pandemics); climate change (weather extremes such as radical storms and heat waves); and disruptive technologies (cyber space, drones, artificial intelligence, social media) are major contributors. These contributors were also indicted in the Stanford existential risk initiative (SERI) study [1]. Luckily, several of these factors are amenable to anthropogenic interventions. But are humans doing enough to prevent the

progression of Doomsday Clock to the point of no return (aka Armageddon)? Would humanity mobilize all that it may take (cooperation, technology, political resolve and courage, and any other resource needed) to constrain anthropogenic polluting emissions, attenuate the exceedance of planetary boundaries, and forestall irreversible perturbation of the earth's system? This chapter proffers mitigation strategies for climate change. Specifically, climate change attenuating applications of biomass resources as indicators of the circular bioeconomy model that could help humanity to dial back the Doomsday Clock are presented.
