Outlook - The Urgency of Rising Temperatures
Look again at that dot... a mote of dust suspended in a sunbeam. - Carl Sagan
So far we have not found anywhere in the Observable Universe that is conducive to life, with the exception of a thin wisp of atmosphere around our home planet, the Earth, that we call our biosphere; a photosynthetic dynasty of carbon-based organisms which miraculously emerged from the Cambrian Explosion. It should come as no surprise that the conditions for life are perfect for humans.
Without the energy we receive from the Sun in the form of sunlight there would be no biosphere, and no one to observe it. The relatively stable pre-industrial levels of carbon dioxide in our atmosphere have for millennia, trapped some of the radiated heat and kept the Earth warmer than it otherwise would be, leading to life as we know it.
Our Earth resides in the "Goldilocks" zone, ~8 light minutes from our star, the Sun, where the surface temperature allows liquid water to form. Plants and trees combine water and sunlight via photosynthesis producing oxygen as a by-product; sequestering carbon in the process - our flora and fauna have a symbiotic exchange between carbon dioxide and oxygen, powered by sunlight, part of the carbon cycle.
However, emission of greenhouse gases from the combustion of fossil fuels has compromised our ability to sequester carbon. More CO2 in the atmosphere means more heat that doesn't escape back into space, creating a many-faceted feedback loop.
Without intervention, and even with immediate cessation, the average global temperature will continue to rise due to inherent latency, seemingly leaving only one possibility, that of geoengineering; theoretically allowing more heat to be radiated into space, or allowing less in.
Our Climate Emergency arises from: the limitations of our current experiment; predictions that lead to out-of-bandwidth scenarios; the magnitude of the course correction; lack of primacy in our global strategy; and our inexperience with geoengineering.
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