Since the mid-18th century, the Earth’s climate has been warming. From the early 1980s, this process has intensified and, by 2020, the global mean temperature anomaly ((TA), relative to 1850-1900 mean T) increased by nearly 1.1oC (NOAA/NCEI 2021, IPCC 2021, Vigileone 2021). Strong global TA increase between 1981-2020, led to unusual environmental, economic and social events (UNESCO 2018, NASA 2018, 2017, NOAA 2017, 2016, NOAA/NCEI 2017, IPCC 2021, 2020, 1919 a-f, 2014, 2007). Some countries during that period suffered from anomalous heat, shortages of rains and harsh and snowy (or opposite) winters, atypical for those places. Warm climate triggered many extreme droughts, followed by hunger in Africa, withering heat in South Asia, multi-year forest fires in North America, besides droughts, there were also devastating hurricanes in Central America, intensive high coast US land floods in 2017 (IPCC 2018, NOAA/ Climate.gov 2018) and other disasters.

Climate experts and media are warning that climate will continue to warm in the future, resulting in the further reduction of ice area, especially in the Northern Hemisphere, ocean level increase and the intensification of natural disasters leading to unusual agricultural and socio-economic consequences. Among them, a reduction of crop production and deterioration of food security will lead to a considerable increase in the number of hungry people in the developing countries (FAO 2018, 2017, IPCC 2007, 2014, 2019 a, b). There are indications that following global warming, between 1981-2020, countries of Africa, Southeast Asia and South & Central America suffered from a lack of food and population hunger in the years of disasters, especially droughts