One of the problems that most concerns society today is the environment. The industrial revolution and its effects have caused a deterioration in our environment that can make our survival difficult if we do not take measures to avoid it. Although it is not true, even remotely, that the Earth itself may be in danger as it is defended in many forums, it is true that we as inhabitants of it are, and we must do something to avoid it.

The hole in the ozone layer, air pollution, acid rain, the greenhouse effect, radioactive waste, urban waste … all these problems have to be studied and solved so that humanity can survive. For this, we must find out how to eliminate CFCs that are already in the air, apart from stop issuing more. The biggest threat does not consist in the increase of skin cancer. Ultraviolet rays can kill much of the soil bacteria and seaweed, completely destroying the base of almost every ecosystem on Earth.

The greenhouse effect has its cause in the ability of carbon dioxide to absorb infrared light and radiate it back in all directions. Thus, the sunlight that reaches the Earth by day is radiated by it into space at night in the form of infrared waves. Then the dioxide acts and part of the radiation comes back to the surface keeping us a little hotter. As this property is not possessed by any other gas that forms the air, it is easy to realize that this effect is necessary so that the Earth is not submerged in a perpetual glacial age. But in its fair measure.

We must reduce the emission of carbon dioxide that is causing an increase in the atmosphere. This causes a gradual warming of the same, which produces a warming of the water of the oceans, which decreases its ability to dissolve carbon dioxide, etc. We are in a vicious circle that can only be broken by reducing the emissions produced by burning coal and oil and encouraging the growth of the forests that absorb it and produce oxygen. For this, it is essential to change energy sources, which perhaps would allow the replacement of the work of the trees by machines that perform this work (to make it cheaper and inexhaustible).

The problem of acid rain, radioactive waste, and air pollution can be considered minor in comparison with those just mentioned, mainly because their solution is the same as the previous one: the obtaining of new sources of energy. Waste, through improved recycling, can also be eliminated more efficiently. Maybe we can even study the possibility of taking our polluting industries to space. But until global action is taken, the greenhouse effect or the hole in the ozone layer is enough and there is not enough to do away with us.

On the other hand, it seems logical to think that, if technology has brought us these ecological problems, many of the advances that we have been venturing into the next century will aggravate or bring about different ones.