Universe = System + Environment
And in reality, systems interact with their environment. We are the systems with the power to interact.
Problem: I have my system + you have yours
Consequence: we interact differently with our environments
Solution =
knowledge of good, sustainable systems + cooperation or laws to impose compliance
THINK ENGINE can measure and monitor environmental variables of interest or dispute e.g., light and illumination, NOISE, temperature and humidity, INSOLATION, soil moisture, RAINFALL, fluid flow, ENERGY FLOW, and radioactivity. Contact us.
N.B. We do not have the capacity to monitor biosystems, but we can evaluate and interpret chemical data from other agencies
Here are some of the instruments we have available to use:
Reed and ExTech physical environmental meters
Light meter
Solar irradiance meter
Omega portable ultrasonic flow meters and data loggers
Onset temperature and humidity data loggers
Amprobe laser spot, infrared thermometer that can measure up to 1 550 deg. C
FLIR high resolution thermal infrared camera
Sound level meter and decibel data logger
GQ Electronics Geiger Counter and data logger for radioactivity
Reed and ExTech physical environmental meters
Light meter
Solar irradiance meter
Omega portable ultrasonic flow meters and data loggers
Onset temperature and humidity data loggers
Amprobe laser spot, infrared thermometer that can measure up to 1 550 deg. C
FLIR high resolution thermal infrared camera
Sound level meter and decibel data logger
GQ Electronics Geiger Counter and data logger for radioactivity
The physics behind everything could seem complicated, but here is how it can be looked at:
The universe consists of matter in space and time: any system or environment has all three.
When we discover symmetries of matter in space, their behavior over time can be found by the principle of least action (some irreverent persons call it the law of laziness, but the derivations require diligence in calculus). Thus arises all the laws of physics. But we will proceed more simply and give credit to the observers and formulators.
In any study with real applications we consider the system we are working on, its surroundings or environment, and their interactions. The ultimate physical environment is the observable universe, which contains all systems except the one being studied. It is also important to realize that when one of its systems studies the natural universe there will arise interactions to disturb the observations and affect the conclusions.
First, some definitions and fundamental ideas
Systems.

Interactions

Change

Matter = mass + charge bound together at the most fundamental level and characterized by the electron charge to mass ratio, e÷m = 175 880 470 000 C/kg.
Space as we observe it has 3 dimensions, mutually perpendicular. Any 2 of them multiplied together gives the size of the surface in area units. All 3 multiplied together gives the size of the space in volume units. Time as we experience it has only direction. Einstein's theory of relativity has mixed it up with matter and space, but it is still the simplest denominator of change. Time is the interval between events. Space is the interval between places. Matter exists in space and time. Matter can be observed in space and time to be composed of finite numbers of elements or building blocks at various levels. At the social level, we can be satisfied with solids, liquids, gases and the means to interconvert them (earth, water, air, fire). At the chemical level, we can work with the different numbers of protons, electrons, neutrons and energy to bind them into pure substances with definite properties according to the laws of quantum mechanics and electrodynamics. At the subnuclear level quantum chromodynamics makes the rules for gluons to bind particles of multiples of 1/3rd the charge on the electron. All this leads us to suppose that some combination of space and time is an essential component of energy that provides the information to arrange the particles of matter in space and time for them to be observed. The measure of ordered information found in a substance is its negative entropy. In thermodynamics it has the unit joule/kelvin, and the dimensions of energy ÷ absolute temperature. The energy is really the observable (sensible) kind that, e.g., boils water to steam (to drive turbines to generate electricity for us to socialize at another level). The absolute temperature is really the statistical evidence of the kinetics of all the atomic particles in the substance then. Division of space is more interesting than its multiplication. We know volume divided by any one of the other dimensions gives area, and area divided by one of its dimensions gives distance, and any dimension divided by the same dimension gives no dimension or a pure number, but what happens when any dimension is divided by any of the other 2 dimensions? The answer can be integral, rational, irrational, or transcendental, depending on the characteristics of the numbers being divided. 
The most well known interaction is between man and environment.
When the environment is large or the number of man is small, the effect of man is not noticeable on the environment. I estimate that a man can live in the forest with no tools other than what are found in the forest. Whatever he does to his environment can be absorbed and the environment can regenerate itself in his lifetime. E.g., he cuts trees only for himself, not to sell, so they grow back. As the population grows there comes a point when the law of regeneration becomes the law of depletion of resources. This sustainability limit is dependent on the properties of the environment and the rapaciousness of the culture. The laws of depletion become the laws of economics with supply and demand of scarce resources. It keeps on getting more complex because, e.g., deforestation causes changes in weather patterns, which can lead to accelerated soil erosion if structural works are not performed; and if they are performed there are more complications attendant upon them. And so on and so forth, both tempered and complicated by further innovations. Similarly, there are different laws of scale when we observe the universe in the large or in the small. Man to mansized observation can be described by the Euclidean geometry we learn in high school. When we are too small to have an effect on the observation, the interaction is negligible; and when we are too large, the interaction may be considerable. In these cases we should seek to describe the outcomes in nonEuclidean geometries. 
Matter ÷ space = density or concentration. Space ÷ time = progress or velocity 
Energy = matter × progress × velocity = force × 1D space = surface tension × 2D space = pressure × 3D space 
Mass ÷ time = current
Charge ÷ time = electric current 