Which is the dominant greenhouse gas leading to global warming?

What does this quotation from the introduction of thedeclaration of independence do?

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases

New communication technologies, improved transportation, and advanced military weapons made it possible for countries to speed up acquiring territory. rule large amounts of territory. fight off competition from opposing nations. expand their economies, which aided in conguest.