Rumors surrounding the development of the SR have circulated for nearly a decade, but most recently, Lockheed Martin has won a government contract to study the feasibility of building a propulsion system capable of Mach 7 for the Blackbird's successor.
But with GMST projected to reach 1.5°C within decades, this imminent threat has focused international attention on the feasibility of efforts to stabilise temperatures, the benefits of successfully doing so, and the risks and implications of reaching 2.0°C.
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