Please ensure you complete this activity first, before completing the Discussion Board activity for this unit. Purpose The purpose of this activity is to understand global warming and the effects it has on us and our planet. Task Watch this video and afterwards, in a Word document and using your own words, explain global warming. Based on the following clip of NASA images, does it appear that global warming is occurring. What led you to your conclusion? Please remember you should submit documents as JPG, PDF, RTF, PNG, DOC and DOCX only. Other formats will not be accepted. Incorrect submission formats could impact your grade.