Many countries around the world have always relied on fossil fuels as a primary source of energy. This trend, however, is changing by the replacement of green energy, including solar, wind, water and nuclear energy. I believe this change is desirable.
Substituting fossil fuels with alternative energy, however, can entail several drawbacks, with the cost concerns being the major one. According to several studies, the equipment and transportation, which are used to generate such energy, can require a great deal of funding. Considering the economic deficiencies of developing countries, such practice can take ages to apply on a large scale, making the process less effective. Reliability of this development should not be neglected as well. Usually, alternative energy mainly depends on sunlight and wind, which is not always available in every geographical locations. This would mean that there is a threat of not being able to supply the whole nation, when the energy is needed massively.
Despite this, I tend to view this change positively. The primary positive of applying renewable energy is the environment. Once fossil fuels are burnt, huge amount of carbon dioxide are emitted, which is the main factor to cause climate change, including rising of temperature as well as sea levels, wildfire. This results in the loss of biodiversity, profound impact on human well-being and the planet Earth. Another positive is its sustainability. Fossil fuels are finite, meaning that they cannot be reproduced and eventually run out. In contrast, alternative energy is renewable, which makes them more sustainable to generate power according to the needs of nations.
In conclusion, the usage of green energy can pose such challenges as high cost implification and doubts on reliability. However, the positives of this trend is favorable as they are environmentally friendly and sustainable.