Abstract
In today's society, environmental issues have an important impact on business and industrial decisions and are becoming part and parcel of economics. We live in scorching summers, the winters seem to be milder from year to year, and the seasons seem to have disappeared. Are these observations scientifically verified? What is the real impact of Man on these phenomena? Thus global warming becomes an inevitable topic and respect of the environment is today a major concern for our survival, fighting pollution has become a priority.
Global warming has increased the average temperature of the Earth's atmosphere and oceans in recent decades. Most of the observed warming over the last 50 years is attributed to human activities. Nevertheless, only a small minority of climate scientists disagree with the fact that acts of humans have played a major role in recent warming.
The main cause of the human-induced component of warming is the increase in atmospheric greenhouse gases, especially carbon dioxide (CO2), methane, and nitrogen oxide, due to activities such as the burning of fossil fuels, land clearing, industrial and agricultural activities, pollution or the treatment of nuclear waste. An increase in global temperatures can, in turn, cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. These changes may increase the frequency and intensity of extreme weather events, such as floods, droughts, heat waves, hurricanes, and tornadoes. Other consequences include higher or lower agricultural yields, glacial retreat, reduced summer stream flows, species extinctions and increases in the ranges of disease vectors.
