Nichole MarulloProfessor TateHistory 10737 December 2020Challenges of the Twenty-First CenturyThe twentieth century faced many new challenges as well as many new innovations. Although the world has progressed majorly since the close of the twentieth century, the twenty-first century still offers a handful of detrimental issues; many of which carried over from the twentieth century. Arguably, two of the most prominent problems in today’s world are rising carbon emissions and the culture of homophobia. Since the beginning of industrialization across the world, carbon emissions have been on a constant rise. The United States, alone, contributed 16.50 tons of carbon in 2014; a seven percent increase from 1990. The amount of carbon produced by the US alone is expected to rise drastically if we continue on the same inefficient path. One of the biggest factors is transportation and industry, which poses a huge threat to Earth. With the constant release of greenhouse gases, the atmosphere has suffered and living conditions have worsened for many.