Fossil fuels form from buried remains of prehistoric organisms in Earth's crust. Process requires millions of years and is non-renewable. Aquatic organisms form petroleum and natural gas, terrestrial plants form coal
Working class refers to employees compensated with wage or salary-based contracts. Common US definitions limit membership to blue-collar and pink-collar workers. Socialists define working class as all workers with only their labor. Working class occupations include unskilled laborers, artisans, outworkers, and factory workers
Climate change is the biggest global health threat of the 21st century. Extreme weather events increase heat-related illnesses and deaths. Heat waves affect mental health and increase risk of chronic conditions. Urban areas experience more severe heat due to heat island effect. Climate change increases frequency and intensity of droughts and floods
Both arose from Industrial Revolution worker exploitation protests. Both assume government-controlled production and central planning. Both aim to eliminate private property and class divisions
Income inequality shows uneven distribution of income across population. Gini Index measures income inequality globally, ranging from 0 to 100. South Africa has highest Gini Index at 63.0, US at 39.8
Social justice refers to fair distribution of resources and opportunities in society. Term originated from Christian theology in 1840s by Italian Jesuit priest Taparelli. John Rawls' 1971 "Theory of Justice" laid foundation for modern social justice