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n what has been hailed as a far-reaching victory for global shark conservation, Air China has become the first airline in mainland China to ban shark fin cargo on its flights. The airline, which is headquartered in Beijing, announced the ban on Friday. "We were one of the first airlines in China to raise the awareness of the unsustainability of the global shark trade," says a message on the carrier's website. "We understand the community's desire to promote responsible and sustainable marine sourcing practices, and this remains important to Air China Cargo's overall sustainable development goals."

Hilton Worldwide will cease serving shark fin and stop accepting new orders for shark fin dishes by April 1, 2014. The ban covers all restaurants and facilities operated by its 96 owned and managed properties across Asia Pacific.

For decades, the slaughter of sharks - sought after for their fins and meat - has been staggering. But bans on finning and new attitudes in Asia toward eating shark fin soup are leading to optimism about the future for these iconic ocean predators

The ocean's value has been estimated as high as $24 trillion, yet despite its inherent connections to the health and well-being of wildlife, humans, and the global economy, it continues to be overexploited and polluted. Plastic pollution and shark killing are two major problems that could be - at least in part - alleviated by new materials: a seaweed-based biodegradable plastic packaging, and a sugarcane-based alternative to a widely used moisturizer normally derived from shark liver oil.

The new Tun Mustapha marine park & shark sanctuary in Borneo is the biggest marine protected area in Malaysia

Recent studies have shown, for example that the loss of important predators - from wolves in boreal forests to sharks in seagrass meadows - can lead to growing populations of terrestrial and marine herbivores, whose widespread grazing reduces the ability of ecosystems to absorb carbon.