Listed below are some of the biosphere's major influences on greenhouse gases. 1  Plants: Carbon dioxide is taken out of the atmosphere by plants during the process of photosynthesis. This promotes cooler climates. 2  Farm animals: Methane gas is produced as farm animals such as cattle and sheep digest their food.
Signal intelligence incorporates the sub-disciplines of communications intelligence (COMINT) electronics intelligence (ELINT), and foreign instrumentation signals intelligence (FISINT). COMINT has the greatest impact on the day-to-day performance of Army missions.
As with many branches of MASINT, specific techniques may overlap with the six major conceptual disciplines of MASINT defined by the Center for MASINT Studies and Research, which divides MASINT into Electro-optical, Nuclear, Geophysical, Radar, Materials, and Radiofrequency disciplines.