From your opinion and a supporting external resource answer the following question: How has a specific human activity  (for example, smoking) altered the geological environment? Make sure to only include ONE human activity- NO REPEATS, and a supporting external reference.

AND

From your opinion and a supporting external resource answer the following question: How has a specific natural disasters   (for example, droughts) alerted the geological environment? Make sure to only include ONE natural disaster- NO REPEATS, and a supporting external resource.

**Please note there is NO word requirement but responses must answer the questions asked.