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2. Hacking the planet may be closer than you think
A world hurtling toward a frighteningly hot future is driving interest in geoengineering — unproven, controversial technologies with a sci-fi flavor that could temporarily freeze global warming in its tracks but not solve the underlying problem.
Why it matters: Ethical, geopolitical and practical considerations must be wrestled with regarding solar radiation management, or SRM — the most discussed and researched method of geoengineering.