"These marks are really great for quantifying social interactions that are otherwise really difficult to observe, since most of the behavior takes place below the surface," she said.

Source: https://phys.org/news/2023-07-mama-boys-elder-orca-moms.html

While measuring carbon is relatively straightforward, quantifying aspects like biodiversity conservation is much more challenging.

Source: https://indianexpress.com/article/opinion/columns/green-credit-strategy-potential-and-pitfalls-9078974/