scarce

This means that during those low oxygen periods, they're able to generate energy from fructose without needing to use scarce oxygen to do so, as generating energy the usual way, from glucose, would require.

Also known as Celtic rainforest, the habitat harbours scarce plants, lichens and fungi, and is considered more threatened than tropical rainforest.

Already he said last week, it is becoming more scarce and prices are rising.

Although some American automakers are transitioning to new batteries that don’t depend on those scarce minerals, many of the largest EV battery producers are in China, South Korea and Japan.

Many in the community have argued that the Reclaimers jumped the line ahead of other needy families who have been languishing for years on affordable housing wait lists and losing lotteries for scarce rentals.