Trade involves the transfer of goods or services from one person or entity to another, often in exchange for money. A system or network that allows trade is called a market.
The product of mental labor — science — always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.
Karl Marx Addenda, "Relative and Absolute Surplus Value" in Economic Manuscripts (1861–63).
Atmospheric remote sensing is vitally important to addressing major societal challenges related to climate change and atmospheric pollution. An EU-funded project is reducing the uncertainty in critical atmospheric parameters and training a new generation of scientists in new observation techniques.