The environment in a multiversal context is not confined to a single planet or even a single universe. There exist unique, fragile ecosystems that exist in the interstitial spaces between realities or have components distributed across several. The 'Sylvan Gloom' is a forest whose roots draw water from a primeval swamp in one dimension, whose canopy photosynthesizes light from a blue giant star in another, and whose fauna migrate through temporary rifts. Pollution, over-harvesting, or destructive development in any one of these linked realities can cause the collapse of the entire trans-reality ecosystem. Traditional environmental law, focused on sovereign territories, is powerless. The IMJ thus pioneered the concept of 'Shared Multiversal Heritage' (SMH), declaring that certain natural wonders belong to all of existence and must be protected for future generations of all species.
An ecosystem is designated as SMH by a unanimous vote of the IMJ's Planetary and Extradimensional Ecology Panel. Once designated, a binding preservation regime is established.
The rescue of the 'Quantum Coral Reef' from the 'Chrome Tide' is a landmark success. An industrial accident in a mechanistic reality spilled self-replicating nano-disassemblers into a dimensional conduit. They infected the Reef, a living mathematical structure that clarified probability streams. The linked realities argued over blame and cost. The IMJ fast-tracked SMH designation, formed an MSC, and mobilized a joint science team from five realities. They developed a counter-nanite keyed to the Reef's unique quantum signature, saving it. The responsible corporation was fined and its assets across three realities seized to fund the cleanup. This case proved that collective environmental responsibility is not only possible but essential for preserving the multiverse's most magnificent and interconnected natural wonders.