Our miniature greenhouse gas analyzer project has been awarded an ERC Proof-of-Concept (PoC) grant. This will boost our development of an ultracompact yet very accurate analyzer based on our fiber Fabry-Perot microcavity technology. It will measure the concentration of greenhouse gases with an accuracy and stability rivaling state-of-the art instruments, but in a handheld, drone-mountable form factor – less then one tenth the weight and one hundreth the volume of existing instruments.