Which activity might lead to damage of a microscope and specimen

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

The response is the basis for vaccination. primary secondary tertiary none of the above