From 1990 to 2008, the world’s most developed economies cut their greenhouse gas emissions from energy production by about a. 5 percent b. 8 percent c. 3 percent d. 2 percent

Over time, historians have changed the ways they study the past because they have: o a. emphasized the study of oral history passed down in communities for generations. o b. started to explore history through the perspectives of many different groups. c. focused on uncovering archaeological evidence rather than analyzing documents. d. largely abandoned studying comparative and cultural history in favor of microhistory.