There is enough talk of hydrogen as a clean fuel and it is true as long as it is generated with renewable and non-polluting sources. Although it has several problems, one of the main ones is its low energy density. However, we must also consider methane, which can paradoxically combat climate change. Although it is considered one of the worst greenhouse gases, however, if we produce biomass in low-cost agricultural areas such as deserts, we will be benefiting the environment and our pockets, it will allow to recover land, fix carbon dioxide, produce oxygen and also cheap and massive clean fuel. Which can be used in vehicles or injected into gas pipelines for distribution. In some cases, the energy need for its operation is higher than the energy produced from the process. In no case do we produce more waste to feed a biogas plant, therefore, its growth is limited
The second alternative
It is a crop to produce energy in this case cactus biogas, which corresponds to a raw material developed by genetic selection to produce quality biomass and its transformation into biogas. These process plants are 15 times smaller than a manure biogas plant, and most importantly, they do not generate waste, the raw material is processed 100%. Only 10% of the energy produced is consumed in the process, 90% remains available. Therefore in this case they are profitable and economically attractive.
This crop combats climate change in several ways: It produces energy with a neutral balance in carbon dioxide, reforests arid areas, improves soil, retains moisture, multiplies life in areas where insects and birds can proliferate, in high-density and extensive plantations. they act as a buffer system or thermal buffer avoiding large fluctuations in temperature, they are basically a cactus forest. They are a brake on forest fires, the cactus is 85% water, a fire cannot spread. It allows to have permanent and local energy, avoiding transport over long distances. It can sequester 250 tons of CO2 / year / hectare.