This is the 17678th most frequent Russian word.
углеродный
Carbon-related.
The word "углеродный" describes something related to carbon in this sentence, specifically the 'carbon footprint', which is a measure of the impact activities have from carbon emissions.
Углеродный след современных технологий вызывает озабоченность.
The carbon footprint of modern technologies raises concern.
Here, "углеродных" is used as an adjective to describe materials composed of carbon or containing carbon.
Использование углеродных материалов эффективно в различных отраслях.
The use of carbon materials is effective in various industries.
In this sentence, "углеродные" modifies "выбросы" (emissions), indicating emissions specifically related to carbon dioxide or other carbon compounds.