Question

Students are comparing the causes of radiative forces since 1750. Radiative force is the capacity of a factor to affect the energy balance of the global climate.InformationA graph.Short description, A graph.,Long description,The graph shows Warming Influence in watts per square meter and Annual Greenhouse Gas Index from 1979 to 2015 for different gases. In order from greatest warming influence and annual greenhouse gas index to least, the gases are:Carbon dioxide, which has a steep increase between 1979 and 2015.Methane, which has a small increase between 1979 and 2015.Nitrous oxide, which has a small increase increase between 1979 and 2015.CFC-12, which has a very small increase between 1979 and 2015.CFC-11, which has only a slight increase between 1979 and 2015.15 other gases, which have only a slight increase between 1979 and 2015.QuestionBased on the data, which ,begin emphasis,two,end emphasis, human activities have most likely contributed the ,begin emphasis,most,end emphasis, to the rise in global temperatures over the past century?Answer options with 5 optionsA.recyclingB.burning fossil fuelsC.thawing Arctic permafrostD.clearing forests for agricultureE.conserving nonrenewable energy sources

Answer 1

Based on the data presented regarding the warming influences of various greenhouse gases, the two human activities that have most likely contributed the most to the rise in global temperatures over the past century are:

B. burning fossil fuels - This activity significantly increases carbon dioxide levels in the atmosphere, which is shown to have the steepest increase in the graph.

D. clearing forests for agriculture - This practice leads to increased carbon dioxide emissions due to deforestation and land-use changes, which also contributes to the overall warming influence.

These activities are the most directly linked to the increases in greenhouse gases like carbon dioxide and methane, which are key drivers of global temperature rise.